The Letter Seen (س) – A Complete Guide to Its Sound, Shape and Use

The Letter Seen (س), called سِين (Sīn) in Arabic, is the 12th letter of the Arabic alphabet. It is the sharp, whistling “s” you make with the tip of your tongue just behind your front teeth. Linguists call it a voiceless alveolar fricative, written [s] in IPA.

German speakers already know this sound, but there is a trap. German turns many “s” sounds into a buzzing [z], as in Sonne, Salat or Rose. Arabic Seen never buzzes. It always sounds like the ss in Wasser, the ß in Straße or the s in Haus.

This guide covers everything you need to know about Seen:

• How to pronounce it, and how to stop German from voicing it
• Its four written forms and how they connect
• Seen with short vowels, long vowels and shadda
• Its role in Tajweed, including the Sun letter rule
• Key words and three useful Arabic roots

Short exercises at the end let you check what you have learned.

Feature	Details
Seen (س)	Name: سِين (Sīn), written “Seen” in English
Sound	[s], like ss in “Wasser” or s in English “sun”
Position in the alphabet	12th (hijāʾī order)
Abjad value	15th in abjad order, value 60
Transliteration	Common: s · DIN 31635: s · ISO 233: s · Arabizi: s (no number needed)
Point of articulation	Tip of the tongue, just above the lower front teeth
Sun or Moon letter	Sun letter
Heavy or light	Always light (muraqqaq)
Dots	None
Connection	Connects on both sides (four forms)

In DIN 31635, “s” always means the voiceless sound and “z” stands for ز. So when you read “salām” in German transliteration, say it with a sharp s, never with a German z-like s.

Where Does Seen (س) Come in the Arabic Alphabet?

In the hijāʾī order used in schools and dictionaries, Seen is the 12th letter: ا ب ت ث ج ح خ د ذ ر ز س. It comes right after Zay (ز), its voiced partner. Learn more in our guide to The Letter Zay (ز).

In the older abjad order (أَبْجَد هَوَّز حُطِّي كَلَمَن سَعْفَص قَرَشَت ثَخَذ ضَظَغ), Seen is the 15th letter and has the value 60. Abjad numbers still appear in dates on manuscripts, inscriptions and the numbering of points in classical books.

Read our Article: How Many Letters in Arabic? 

Seen and Sheen: How to Tell س from ش

Seen shares its body with exactly one letter:

• س Seen: three teeth and a bowl, no dots
• ش Sheen: the same body with three dots above

Learn the twin letter in detail in our guide to The Letter Sheen (ش). Once your hand knows the body of س, writing ش only means adding three dots.

Why Seen (س) Is a Sun Letter

Seen is one of the 14 Sun letters (الْحُرُوفُ الشَّمْسِيَّة). When the article الْـ comes before it, you do not pronounce the lām. Instead, the lām merges into the Seen, which is doubled.

• السَّمَاء, as-samāʾ, the sky
• السُّوق, as-sūq, the market
• السَّلَام, as-salām, peace

In writing, the lām stays on the page but carries no sukūn, and the Seen carries a shadda: السَّـ. If you read “al-samāʾ”, you have pronounced a letter that should stay silent.

Want to master all 28 letters in the right order? The Arabic Alphabet Course at Denk Arabisch teaches each letter’s shape, sound and Sun or Moon behaviour step by step.

Where Seen Is Made: Makhraj and Tajweed

Seen comes from the tip of the tongue (أَسَلَةُ اللِّسَانِ), placed just above the lower front teeth, with a small gap between the upper and lower teeth for the air. Scholars call this group the asaliyya letters (الْحُرُوفُ الْأَسَلِيَّة).

The tip of the tongue produces four groups of letters:

Zone	Arabic	Letters
Tip of the tongue + gum ridge of the upper teeth	نِطْعِيَّة	ط د ت
Tip of the tongue + edges of the upper teeth	لِثَوِيَّة	ظ ذ ث
Tip of the tongue + just above the lower teeth	أَسَلِيَّة	ص ز س
Tip and edge of the tongue	ذَلْقِيَّة	ر ل ن

Seen shares its exact makhraj with ز and ص. Only their attributes separate them, which is why they appear in the mistakes section below.

The Six Pronunciation Characteristics of Seen

The letter Seen (س) has six distinctive pronunciation characteristics that shape how its sound is produced, from the flow of breath and softness of the sound to its thin quality and characteristic whistling.

1. Hams (الْهَمْس), whisper: the breath flows freely and the vocal cords stay still. Its letters gather in فَحَثَّهُ شَخْصٌ سَكَتْ.
2. Rakhāwa (الرَّخَاوَة), softness: the sound runs on as long as you have breath, like سسسس.
3. Istifāl (الِاسْتِفَال), lowering: the back of the tongue stays down, so the sound is thin.
4. Infitāḥ (الِانْفِتَاح), openness: the tongue does not press against the palate.
5. Iṣmāt (الْإِصْمَات), restraint: Seen is not one of the “fluent” letters of فَرَّ مِنْ لُبّ, which are made with the tongue tip or lips.
6. Ṣafīr (الصَّفِير), whistling: a sharp hiss as air squeezes past the teeth. Only ص ز س have it.

Why Seen Always Has a Light Sound

Seen is always light (muraqqaq). It is not one of the heavy letters of خُصَّ ضَغْطٍ قِظْ, and no neighbour can make it heavy.

This matters next to heavy letters. In الصِّرَاطَ الْمُسْتَقِيمَ (Al-Fātiḥah 1:6), the phrase starts with a heavy ṣād, and the Seen of الْمُسْتَقِيمَ comes just before the heavy ق. Yet the Seen stays thin. Let the back of your tongue rise only for the ق.

Seen in Quran Recitation: Sun-Letter Assimilation and Ikhfāʾ

Seen triggers two rules. First, the Sun letter rule (idghām shamsī): the lām of الْـ disappears into the Seen.

• اقْتَرَبَتِ السَّاعَةُ وَانشَقَّ الْقَمَرُ (Al-Qamar 54:1): السَّاعَة has a silent lām and a doubled Seen, while الْقَمَر keeps its lām. One verse shows both rules.
• هُوَ اللَّهُ الَّذِي لَا إِلَٰهَ إِلَّا هُوَ الْمَلِكُ الْقُدُّوسُ السَّلَامُ (Al-Ḥashr 59:23): read as-salām, never al-salām.

Second, Seen is one of the 15 letters of ikhfāʾ. A nūn sākina or tanwīn before Seen is hidden with a light nasal sound, held for two counts.

• إِنَّ الْإِنسَانَ لَفِي خُسْرٍ (Al-ʿAṣr 103:2): the nūn in الْإِنسَانَ is hidden before the Seen.
• تَرْمِيهِم بِحِجَارَةٍ مِّن سِجِّيلٍ (Al-Fīl 105:4): the nūn of مِن is hidden before سِجِّيل.

Seen in the Opening Letters of Quranic Surahs

Seen appears among the separated letters (الْحُرُوفُ الْمُقَطَّعَة) at the start of some surahs:

• يس (Yā Sīn 36:1)
• طسٓمٓ (Ash-Shuʿarāʾ 26:1 and Al-Qaṣaṣ 28:1)
• طسٓ (An-Naml 27:1)
• عٓسٓقٓ (Ash-Shūrā 42:2)

Here you read the letter’s name, sīn, and stretch its long ī for six counts (madd lāzim).

When Ṣād (ص) Is Pronounced as Seen (س)

In the Ḥafṣ ʿan ʿĀṣim reading, two words are written with ص but read with Seen. The muṣḥaf marks them with a small س above the ṣād.

• وَاللَّهُ يَقْبِضُ وَيَبْصُۜطُ (Al-Baqarah 2:245), read wa-yabsuṭ
• وَزَادَكُمْ فِي الْخَلْقِ بَصْۜطَةً (Al-Aʿrāf 7:69), read basṭatan

Other readings may differ here. If you recite in another riwāya, check with your teacher.

Want your recitation checked letter by letter? The Quran Tajweed Course for German Speakers at Denk Arabisch explains each rule in German and corrects your recitation live.

How to Pronounce the Arabic Letter Seen (س)

Seen sounds like the ss in Wasser, the ß in Straße and the s in Haus or Glas. It is the same sound as the s in English “sun”, French “sac” and Spanish “sol”. English speakers only need to avoid the z sound they use in plurals like “dogs”.

Seen Pronunciation for German Speakers

German has the right sound, but it uses it only in some positions. Watch out for these German habits:

• At the start of a word before a vowel, German s is voiced: Sonne, Salat, sagen.
• Between two vowels, German s is voiced too: Rose, lesen, Reise.
• At the start of a word, st and sp become “scht” and “schp”: Stein, Sport.

Arabic Seen ignores all of these rules. It is voiceless in every position.

• سَلَام: German readers often say “Zalaam”, like German Salat. Say it with the hiss of Straße.
• رَسُول: German readers often say “Razuul” because the s sits between vowels. Keep it sharp: rasūl.

A Simple Step-by-Step Method for Pronouncing Seen

Pronouncing Seen (س) correctly becomes easier when you follow a few simple steps. Pay attention to the position of the lips and tongue, the flow of air, and the absence of vocal-cord vibration.

1. Mouth: keep your lips relaxed and slightly spread, as for a light smile. Do not round them.
2. Tongue: rest the tip just above your lower front teeth. Keep the back of the tongue low.
3. Air: leave a narrow gap between your teeth and push the air through it, so you hear a whistle.
4. Voice: keep your throat still. Your vocal cords should not vibrate at all.

Seen vs. Similar Arabic Sounds: Easy Pronunciation Comparisons

These word pairs sound very similar, but a small change in the tongue, lips, or voice can completely change the meaning.

Word 1	Meaning	Word 2	Meaning	Difference
سِعْر (siʿr)	price	شِعْر (shiʿr)	poetry	ش adds “sh” and lip rounding
سَيْف (sayf)	sword	صَيْف (ṣayf)	summer	ص is heavy, with the tongue raised
سَارَ (sāra)	he walked	زَارَ (zāra)	he visited	ز is voiced, the throat buzzes
سَارَ (sāra)	he walked	ثَارَ (thāra)	he revolted	ث puts the tongue between the teeth

Read each pair aloud five times, then ask someone to say one word at random while you guess which it was.

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How to Write Seen (س) in Arabic: All Four Forms

Arabic runs from right to left, and Seen connects on both sides, so it has four forms. The previous letter decides whether Seen starts a new chain.

Form	Shape	Example	Transliteration	Meaning
Isolated	س	رَأْس	raʾs	head
Initial	سـ	سَمَك	samak	fish
Medial	ـسـ	مَسْجِد	masjid	mosque
Final	ـس	شَمْس	shams	sun

1. Isolated Form (س)

Used when Seen stands alone or follows a non-connecting letter (ا د ذ ر ز و) at the end of a word.

Shape: three small teeth on the line, followed by a deep, round bowl that dips below the line.

Examples: رَأْس (raʾs, head), دُرُوس (durūs, lessons), نَاس (nās, people).

2. Initial Form (سـ)

Used at the start of a word, or in the middle after a non-connecting letter.

Shape: the three teeth only, with a short line leading to the next letter. The bowl disappears.

Examples: سَمَك (samak, fish), سُوق (sūq, market), رَسُول (rasūl, messenger), where ر does not connect.

3. Medial Form (ـسـ)

Used between two letters that both connect to it.

Shape: a line coming in, three teeth, and a line going out.

Examples: مَسْجِد (masjid, mosque), إِنْسَان (insān, human being), مُسْلِم (muslim, Muslim).

4. Final Form (ـس)

Used at the end of a word after a connecting letter.

Shape: a line coming in, three teeth, then the full bowl below the line.

Examples: شَمْس (shams, sun), جَلَسَ (jalasa, he sat), خَمْس (khams, five).

One rule never changes: Seen has no dots. In Ruqʿa handwriting, the teeth are often smoothed into a flat line, so learn to recognise Seen by the missing dots, not only by its teeth.

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Seen with Vowels

Because Seen is a light letter, its vowels stay pure: sa is a bright “a”, never the dark “o”-like a you hear after ص.

Seen with Arabic Short Vowels

Seen (س) can be pronounced with the three short Arabic vowels—fatḥa, ḍamma, and kasra—as well as with sukūn. Learning these forms helps learners recognize and pronounce Seen correctly in different Arabic words. 

Mark	Name	Sound	Example	Meaning
سَ	fatḥa	sa	سَمَك (samak)	fish
سُ	ḍamma	su	سُكَّر (sukkar)	sugar
سِ	kasra	si	سِكِّين (sikkīn)	knife
سْ	sukūn	s	بِسْمِ (bismi)	in the name of

With sukūn, Seen keeps hissing for a moment. This is hams at work: the breath does not stop.

Seen with Long Vowels and Madd

Seen (س) can be combined with the long vowels Alif, Wāw, and Yā to produce extended sounds. These forms are an important part of Arabic pronunciation and help learners understand how the sound of Seen changes with Madd. 

Combination	Sound	Example	Meaning
سَا	sā	سَاعَة (sāʿa)	hour, clock
سُو	sū	سُوق (sūq)	market
سِي	sī	سِيرَة (sīra)	biography

Hold a long vowel about twice as long as a short one: سَ (sa) versus سَا (sā).

Seen also forms two diphthongs: سَوْ (saw) in سَوْفَ (sawfa, will) and سَيْ (say) in سَيْف (sayf, sword).

How Shadda Changes the Sound of Seen

A shadda doubles the Seen: you hold the hiss, close it, then release it into the next vowel.

• حَسَّاس, ḥassās, sensitive
• كَسَّرَ, kassara, he smashed
• السَّلَام, as-salām, peace (shadda from the Sun letter rule)

Discover our guide “Harakat in Arabic” and learn how Fatha, Damma, Kasra, Sukoon, and Tanween work in a simple and practical way.

Three Useful Arabic Roots That Contain Seen

Most Arabic words grow from a root of three consonants, so one root can unlock a whole family of words. Here are three roots with Seen that you will meet in daily Arabic and in the Quran.

س ل م (peace, safety)

The root س ل م is connected with meanings of peace, safety, and submission. Learning words from this root helps learners see how the same Arabic letters can form related words with different meanings. 

Word	Transliteration	Meaning
سَلَام	salām	peace, greeting
سَلِيم	salīm	sound, safe
مُسْلِم	muslim	Muslim (one who submits)
سَلَّمَ	sallama	he greeted, he handed over

د ر س (studying)

The root د ر س is connected with learning and education. These related words show how the same Arabic root can be used to describe studying, lessons, schools, and teachers.

Word	Transliteration	Meaning
دَرَسَ	darasa	he studied
دَرْس	dars	lesson
مَدْرَسَة	madrasa	school
مُدَرِّس	mudarris	teacher

Here Seen is the last root letter. In مَدْرَسَة it takes its initial form, because ر before it does not connect.

س ج د (prostrating)

The root س ج د is connected with prostration and worship. These related words show how the same Arabic root can describe the act of prostrating, prostration itself, the place of worship, and the person who prostrates. 

Word	Transliteration	Meaning
سَجَدَ	sajada	he prostrated
سُجُود	sujūd	prostration
مَسْجِد	masjid	mosque, place of prostration
سَاجِد	sājid	one who prostrates

Want to read Quranic words and recognise their roots? The Quranic Arabic Course for German Speakers at Denk Arabisch builds your vocabulary root by root, explained in German.

Examples of Seen in Words

Seen (س) can appear at the beginning, middle, or end of an Arabic word. The following examples show how its position changes within the word.

Position	Arabic Word	Transliteration	Meaning
Beginning	سَمَك	samak	fish
Middle	مَسْجِد	masjid	mosque
End	شَمْس	shams	sun

Examples of Seen in Sentences

Each sentence uses words from the table above, so you can practise Seen in real speech.

Arabic Sentence	Transliteration	Meaning
السَّمَكُ فِي السُّوقِ رَخِيصٌ.	as-samaku fī s-sūqi rakhīṣun.	The fish at the market is cheap.
أُصَلِّي فِي الْمَسْجِدِ.	uṣallī fī l-masjidi.	I pray in the mosque.
دَرْسُ الْيَوْمِ عَنِ الشَّمْسِ.	darsu l-yawmi ʿani sh-shamsi.	Today’s lesson is about the sun.

The first sentence also contains ص in رَخِيص, so you can hear light س and heavy ص side by side.

Read “Arabic Sentences” and start building your Arabic skills today!

Common Seen Pronunciation Mistakes and How to Fix Them

Understanding these common mistakes can help learners pronounce Seen correctly and maintain a clear distinction between similar Arabic sounds.

1. Voicing Seen into Zāy (ز), the German Habit

German voices s at the start of a word and between vowels, so سَلَام turns into “zalām” and رَسُول into “razūl”. In Arabic this can change the word: سَارَ (he walked) becomes زَارَ (he visited).

Test: put two fingers on your throat and say سسسس, then ززززز. You should feel a buzz only for ز.

2. Making Seen Heavy like Ṣād (ص)

Near heavy letters, learners raise the back of the tongue and Seen darkens into ṣād. Then سَيْف (sword) sounds like صَيْف (summer).

Test: say سَيْف in front of a mirror. Your lips should stay spread and the “a” should stay bright, not sound like “o”.

3. Mixing up Seen and Sheen (ش)

In speech, rounding the lips turns s into sh. In reading, beginners miss the three dots above ش.

Test: say سِعْر and شِعْر. For س your lips stay flat; for ش they push slightly forward.

4. Reading Thāʾ (ث) as Seen

In many spoken dialects ث is pronounced as s, so learners read ثَارَ as سَارَ. In Quran recitation and standard Arabic, the two must stay apart.

Test: look in a mirror while saying ثَارَ. The tip of your tongue should be visible between your teeth. For سَارَ it stays hidden.

Practice Exercises: Test Your Knowledge of Letter Seen

These exercises will help you review the shape, pronunciation, and correct use of Seen while testing your ability to recognize it in different Arabic words and sentences.

Exercise 1: Multiple Choice

Which word begins with Seen?

• a) شَمْس
• b) صَيْف
• c) سَيْف
• d) زَارَ

Answer: c) سَيْف (sayf, sword).

Exercise 2: Matching

Match each word with its meaning: سَمَك, سُوق, مَسْجِد, دَرْس → lesson, mosque, fish, market.

Answer: سَمَك = fish, سُوق = market, مَسْجِد = mosque, دَرْس = lesson.

Exercise 3: Writing Practice

Write Seen in its four forms: س سـ ـسـ ـس. Then copy these words and name the form of Seen in each: سَمَك, مَسْجِد, شَمْس, رَأْس.

Exercise 4: True or False

1. Seen is a Moon letter.
2. Seen has three dots above it.
3. Seen is always a light letter.
4. In مَدْرَسَة, Seen is written in its medial form.

Answers: 1. False, it is a Sun letter. 2. False, that is ش. 3. True. 4. False, it takes its initial form because ر does not connect.

Exercise 5: Find the Letter

How many times does Seen appear in this sentence? السَّمَكُ فِي السُّوقِ رَخِيصٌ.

Answer: Two times, in السَّمَك and السُّوق. The ص in رَخِيص is a different letter.

Explore “Arabic Texts for Beginners” and discover simple texts that make learning Arabic more enjoyable and effective.

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Learn the Arabic Alphabet Step by Step with Denk Arabisch

Seen is one of 28 letters. Each new letter is easier when it builds on the one before, in a clear order with a teacher who hears your mistakes.

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Conclusion

The Letter Seen (س) is one of the easiest Arabic letters to learn, as long as you keep it sharp and light.

• Sound: a voiceless, whistling [s], like ss in Wasser, never the buzzing German s of Sonne.
• Writing: three teeth with no dots, in four forms, and a bowl only in the isolated and final forms.
• Recognition: no dots means س, three dots means ش, and a closed loop means ص.

Practise the hiss with your hand on your throat, write the four forms, and read the minimal pairs with ش ص ز and ث. Then review the roots س ل م, د ر س and س ج د until their words feel familiar.

With a few minutes a day, Seen will soon be one of the letters you read without thinking. Book a free trial lesson at Denk Arabisch and take the next letter with a teacher at your side.

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