The Arabic language abounds in unique attributes, making it an intriguing and complex one. One such attribute of Arabic grammar is distinguishing between moon letters and sun letters in Arabic (‘Huruf al-Shamsiyyah’ and ‘Huruf al-Qamariyyah’). These classifications affect the pronunciation of nouns that start with the definite article ‘al-‘. Mastery of the Sun and Moon letter rules is a necessity for correct pronunciation, fluency, and comprehension in Arabic, whether spoken or written.
What are the Sun and Moon letters?
In Arabic, Sun and Moon letters (الحروف الشمسية والحروف القمرية) are categories of consonants that affect how the definite article “ال” (al-) is pronounced when it appears at the beginning of a word.
🌞 Sun Letters (الحروف الشمسية – al-ḥurūf ash-shamsiyyah)
When a word begins with a Sun letter, the “l” (ل) in “al-” is assimilated into the following letter. This causes the Sun letter to be doubled (shadda: ّ) and the “l” is silent.
Sun Letters:
ت، ث، د، ذ، ر، ز، س، ش، ص، ض، ط، ظ، ل، ن
Examples:
- الشمس (ash-shams) – the sun
- النور (an-nūr) – the light
- الريح (ar-rīḥ) – the wind
Note: Although it’s spelled “al-“, it’s pronounced “ash-“, “an-“, “ar-“, etc., depending on the Sun letter that follows.
🌙 Moon Letters (الحروف القمرية – al-ḥurūf al-qamariyyah)
When a word begins with a Moon letter, the “l” in “al-” is pronounced clearly, with no assimilation.
Moon Letters:
أ، ب، ج، ح، خ، ع، غ، ف، ق، ك، م، هـ، و، ي
Examples:
- القمر (al-qamar) – the moon
- البيت (al-bayt) – the house
- الولد (al-walad) – the boy
Easy Trick to Remember
- Sun letters are the ones that cause the “l” in al- to disappear in pronunciation and double the first letter.
- Moon letters let the “l” in al- stay audible.
A helpful mnemonic to memorize the Sun letters is this Arabic phrase:
“طب ثم صل رحما تفز ضف ذا نعم دع سوء ظن”
Every letter at the beginning of these words is a Sun letter.
Why are they called Sun and Moon letters?
They’re called Sun and Moon letters because of the way the definite article “ال” (al-) is pronounced before each type of letter using the Arabic words for “the sun” and “the moon” as classic examples and you can learn more about it if you enroll into Arabic Language classes
🌞 “Ash-Shams” (the Sun) → Sun Letters
In Arabic, “the sun” is written as الشمس and pronounced ash-shams, not al-shams.
Here, the “l” in “al-” is assimilated into the ش (sh) sound. This doubling effect gives these letters their name: Sun letters.
🌙 “Al-Qamar” (the Moon) → Moon Letters
In contrast, “the moon” is written as القمر and pronounced al-qamar, where the “l” is clearly pronounced.
Because the “l” remains intact before letters like ق (q), these are called Moon letters.
So why these names?
Arabic grammarians chose “the sun” (الشمس) and “the moon” (القمر) as memorable, natural examples of the two pronunciation rules.
- One word shows the assimilation rule (Sun letters).
- The other shows the no-assimilation rule (Moon letters).
The names stuck as an easy way to teach learners the pronunciation difference.
Sun and Moon Arabic Letters
🌞 Sun Letters (الحروف الشمسية)
| Arabic Letter | Name (Arabic) | Name (Transliteration) | Example Word | With “ال” | Pronunciation |
| ت | تاء | Tāʼ | تمر (dates) | التمر | at-tamr |
| ث | ثاء | Thāʼ | ثعلب (fox) | الثعلب | ath-tha‘lab |
| د | دال | Dāl | دب (bear) | الدب | ad-dubb |
| ذ | ذال | Dhāl | ذهب (gold) | الذهب | adh-dhahab |
| ر | راء | Rāʼ | رجل (man) | الرجل | ar-rajul |
| ز | زاي | Zāy | زهر (flower) | الزهر | az-zahr |
| س | سين | Sīn | سمك (fish) | السمك | as-samak |
| ش | شين | Shīn | شمس (sun) | الشمس | ash-shams |
| ص | صاد | Ṣād | صوت (sound) | الصوت | aṣ-ṣawt |
| ض | ضاد | Ḍād | ضوء (light) | الضوء | aḍ-ḍawʼ |
| ط | طاء | Ṭāʼ | طعام (food) | الطعام | aṭ-ṭa‘ām |
| ظ | ظاء | Ẓāʼ | ظرف (envelope) | الظرف | aẓ-ẓarf |
| ل | لام | Lām | ليل (night) | الليل | al-layl |
| ن | نون | Nūn | نور (light) | النور | an-nūr |
🌙 Moon Letters (الحروف القمرية)
| Arabic Letter | Name (Arabic) | Name (Transliteration) | Example Word | With “ال” | Pronunciation |
| أ | ألف | Alif | أسد (lion) | الأسد | al-asad |
| ب | باء | Bāʼ | باب (door) | الباب | al-bāb |
| ج | جيم | Jīm | جبل (mountain) | الجبل | al-jabal |
| ح | حاء | Ḥāʼ | حجر (stone) | الحجر | al-ḥajar |
| خ | خاء | Khāʼ | خبز (bread) | الخبز | al-khubz |
| ع | عين | ‘Ayn | عين (eye/spring) | العين | al-‘ayn |
| غ | غين | Ghayn | غيم (cloud) | الغيم | al-ghaym |
| ف | فاء | Fāʼ | فم (mouth) | الفم | al-fam |
| ق | قاف | Qāf | قلم (pen) | القلم | al-qalam |
| ك | كاف | Kāf | كلب (dog) | الكلب | al-kalb |
| م | ميم | Mīm | ماء (water) | الماء | al-māʼ |
| هـ | هاء | Hāʼ | هواء (air) | الهواء | al-hawāʼ |
| و | واو | Wāw | ولد (boy) | الولد | al-walad |
| ي | ياء | Yāʼ | يد (hand) | اليد | al-yad |
moon letters and sun letters in arabic
🌞 الحروف الشمسية (Sun Letters)
These letters assimilate the “ل” of the definite article ال.
ت، ث، د، ذ، ر، ز، س، ش، ص، ض، ط، ظ، ل، ن
🌙 الحروف القمرية (Moon Letters)
These letters do not assimilate the “ل” of ال, and it is pronounced clearly.
أ، ب، ج، ح، خ، ع، غ، ف، ق، ك، م، هـ، و، ي
Also Read about: animals in arabic alphabet
The difference between Sun and Moon letters in Arabic
🌞 Sun Letters (الحروف الشمسية)
Rule:
When a word begins with a Sun letter, the “ل” (l) in “ال” is not pronounced. Instead, the Sun letter is doubled with a shaddah ( ّ ).
Example:
- شمس (shams – sun)
- With “ال”: الشمس
- Pronounced: ash-shams (not al-shams)
Why?
The Sun letters are strong, front-of-the-mouth sounds, so they cause the “l” to assimilate.
🌙 Moon Letters (الحروف القمرية)
Rule:
When a word begins with a Moon letter, the “ل” (l) in “ال” is clearly pronounced.
Example:
- قمر (qamar – moon)
- With “ال”: القمر
- Pronounced: al-qamar
Why?
Moon letters are softer, back-of-the-mouth sounds, so the “l” remains distinct.
Also Read about: Pretty Arabic Words
Importance of Sun and Moon Letters in Arabic Grammar
1. Correct Pronunciation
Arabic is described as a phonetic language in that the variation in the pronunciation of words can lead to a different meaning or accent on the meaning or lack of clarity.
Mispronunciation of the Arabic definite article “ال” (al-) can make words unclear or simply wrong.
Example:
النور (an-nūr – the light) vs. الْنور (al-nūr – incorrect pronunciation)
2. Reading Fluency
Knowing sun and moon letters helps readers:
Know when to expect a shaddah( ّ ).
Predict whether the “ل” in ال will be silent or will be pronounced.
This is especially helpful for students reading Qur’an and classical Arabic.
3. Proper Spelling and Writing
Despite being dropped sometimes in pronunciation, the “ل” is always written.
The learners must differentiate:
What is written (ال + word)
What is pronounced (assimilation vs. full articulation)
4. Grammar and Syntax Understanding
This rule combines tajwīd (rules of Qur’anic recitation) and the general phonology of Arabic.
It helps in:
Identifying word types
Understanding noun-adjective agreement
Understanding phrase construction in formal Arabic
Words start with Sun letters example
- 🌞 Examples of Words Starting with Sun Letters
| Word (No “ال”) | With “ال” (Spelling) | Pronunciation (Transliteration) | Meaning |
| تاجر | التاجر | at-tājir | the merchant |
| تمر | التمر | at-tamr | the dates |
| ثوب | الثوب | ath-thawb | the garment |
| ثعلب | الثعلب | ath-tha‘lab | the fox |
| درس | الدرس | ad-dars | the lesson |
| دب | الدب | ad-dubb | the bear |
| ذهب | الذهب | adh-dhahab | the gold |
| ذكرى | الذكرى | adh-dhikrā | the memory |
| رجل | الرجل | ar-rajul | the man |
| ربيع | الربيع | ar-rabī‘ | the spring (season) |
| زهرة | الزهرة | az-zahrah | the flower |
| زيت | الزيت | az-zayt | the oil |
| سمك | السمك | as-samak | the fish |
| ساعة | الساعة | as-sā‘ah | the clock/hour |
| شمس | الشمس | ash-shams | the sun |
| شارع | الشارع | ash-shāri‘ | the street |
| صوت | الصوت | aṣ-ṣawt | the sound |
| صلاة | الصلاة | aṣ-ṣalāh | the prayer |
| ضوء | الضوء | aḍ-ḍawʼ | the light |
| ضيف | الضيف | aḍ-ḍayf | the guest |
| طعام | الطعام | aṭ-ṭa‘ām | the food |
| طريق | الطريق | aṭ-ṭarīq | the road |
| ظرف | الظرف | aẓ-ẓarf | the envelope |
| ظلم | الظلم | aẓ-ẓulm | the oppression |
| ليل | الليل | al-layl | the night |
| لسان | اللسان | al-lisān | the tongue |
| نور | النور | an-nūr | the light |
| نجم | النجم | an-najm | the star |
Words start with Moon letters example
| Moon Letter | Letter Name (Arabic) | Example Word (Arabic) | Meaning (English) | With Definite Article | Pronunciation |
| أ | ألف | أسد | Lion | الأسد | al-asad |
| ب | باء | باب | Door | الباب | al-bāb |
| ج | جيم | جبل | Mountain | الجبل | al-jabal |
| ح | حاء | حجر | Stone | الحجر | al-ḥajar |
| خ | خاء | خبز | Bread | الخبز | al-khubz |
| ع | عين | علم | Flag/knowledge | العلم | al-‘ilm |
| غ | غين | غيم | Cloud | الغيم | al-ghaym |
| ف | فاء | فم | Mouth | الفم | al-fam |
| ق | قاف | قلم | Pen | القلم | al-qalam |
| ك | كاف | كتاب | Book | الكتاب | al-kitāb |
| م | ميم | ماء | Water | الماء | al-mā’ |
| هـ | هاء | هواء | Air | الهواء | al-hawā’ |
| و | واو | ولد | Boy | الولد | al-walad |
| ي | ياء | يد | Hand | اليد | al-yad |
Common Mistakes to Avoid with Sun and Moon Letters
1. Pronouncing the “ل” in Sun Letters
Mistake: Pronouncing the “ل” of “ال” before Sun letters.
Correct: The “ل” is not pronounced, and the Sun letter is given a shaddah ( ّ ).
Example:
Incorrect: al-shams
Correct: ash-shams (الشمس)
2. Not Doubling the Sun Letter
Mistake: Not placing the shaddah ( ّ ) on the Sun letter following the definite article.
Correct: The Sun letter must always be stressed (doubled).
Example:
Incorrect: as-sad
Correct: ass-sad (الصّد)
3. If the “ل” Is Silent in Moon Letters
Mistake: The “ل” is skipped or treated as silent before Moon letters.
Correct: The “ل” is always pronounced clearly with Moon letters.
Example:
Incorrect: al-qamar pronounced as aq-qamar
Correct: al-qamar (القمر)
4. Mixing Up Which Letters Are Sun and Moon
Mistake: Mixing Sun and Moon letters and applying wrong pronunciation rules.
Tip: Memorize the list and practice examples on a regular basis.
5. Writing the “ل” as Silent
Mistake: Not writing the “ل” because it is silent in Sun letters.
Correct: Write the “ال” in all cases regardless of pronunciation.
6. Not Applying Sun and Moon Letter Rules in Tajweed
Mistake: Not applying the rules of assimilation during Tajweed.
Correct: In Tajweed, these rules should be applied accordingly.
Pronunciation Rules for Sun and Moon Letters
Arab phonetic rules regarding sun and moon letters
1. Sun letters
Sun letters are those to which the definite article “ال” (al-) is attached; thus, the letter “ل” (l) is not pronounced. Instead, the sound of the letter merges with that of the sun letter, causing it to be assimilated (doubled) and pronounced with a shaddah over it.
Examples:
الشمس (the sun)
ash-shams (not al-shams)
النهر (the river)
an-nahr (not al-nahr)
2. Moon Letters
When the definite article “ال” (al-) is placed before a Moon letter, the “ل” (l) is pronounced clearly.
There is no assimilation, and Sun letter doubling does not take place.
Example:
القمر (the moon)
Pronounced: al-qamar
البيت (the house)
Pronounced: al-bayt
3. Overall Visual and Phonetic Summary
Letter Type “ال” Pronunciation Letter Pronounced with Shaddah ( ّ )?
Example Word Pronunciation
Sun Letters (شمسية) “ل” is silent, assimilated into next letter Yes الشمس ash-shams
Moon Letters (قمرية) “ل” pronounced clearly No القمر al-qamar
4. Extra Remarks
The written forms always keep the definite word “ال”, regardless of pronunciation.
This process happens only in speech, not in writing.
Knowing these rules helps with fluent and natural Arabic pronunciation throughout its history until now, especially surface Arabic and Quranic Arabic.
Why is it important to understand Sun and Moon letters?
Mastering this concept helps with:
- Accurate reading and writing
- Professional and academic communication
- Correct Tajweed in Quranic recitation
Are Lam Shamsiyah and Lam Qamariyah the Same as Sun and Moon Letters?
Yes. The terms refer specifically to the behavior of the “lam” (\u0644) in “al-“:
- Lam Shamsiyah: Assimilated “l” (Sun letters)
- Lam Qamariyah: Pronounced “l” (Moon letters)
Is Alif a Sun or Moon Letter?
In Arabic, Alif (ا) is a Moon letter (حرف قمري).
Thus, when the definite article “ال” (al-) precedes a word starting with Alif, the “ل” is pronounced distinctly and not assimilated.
For example: الكريم (al-Karim — The Generous)
It is pronounced exactly as al-karim and not even close to al-lkarim or with any assimilation.
What are sun and moon letters in the Quran?
Examples from the Quran
| Letter Type | Example Verse (Arabic) | Definite Article + Word | Pronunciation |
| Sun Letter | الشمس تجري لمستقر لها (Surah Ya-Sin 36:38) | الشمس | ash-shams |
| Moon Letter | والقمر قدرناه منازل حتى عاد كالعرجون القديم (Surah Al-Isra 17:12) | القمر | al-qamar |
Importance in Quranic Recitation (Tajweed)
- Properly applying the Sun and Moon letter rules ensures correct pronunciation, fluency, and respect in Quran recitation.
- It affects the melody and rhythm of recitation.
- The assimilation for Sun letters is a key Tajweed rule called idgham shamsiyyah.
- For Moon letters, the clear pronunciation of “ل” maintains the correct articulation.
Conclusion
Understanding Sun and Moon letters in Arabic is a foundational part of mastering the language. It affects pronunciation, grammar, and Quranic recitation. By recognizing which letters belong to each group, and practicing how they interact with the definite article “al-“, learners gain fluency and accuracy. With practice, the distinction becomes second nature.
FAQs
Q: Are Sun and Moon letters used in all Arabic dialects?
A: Yes, though the degree of pronunciation accuracy may vary in casual speech.
Q: Do Sun and Moon letters affect spelling?
A: No, only pronunciation is affected. The spelling remains with \u0627\u0644 (al-).
Q: Is this rule important for beginners?
A: Absolutely. It is one of the first pronunciation rules new learners should master.
Q: Do Sun and Moon letters appear in verbs too?
A: The rule mainly applies to nouns that take the definite article “al-“.
Q: Is this rule unique to Arabic?
A: Yes, it is a unique feature of Arabic phonology and grammar.