Lam Shamsiyya and Lam Qamariyya: The Rules of Lam Shamsiyya and Lam Qamariyya in Tajweed
By admin on 12/22/2025 · 5 min read
Shamsya and Qamarya Lam: The Rules of Lam Shamsiyya and Lam Qamariyya in Tajweed (UK British Muslim Guide)
Every Arabic noun or adjective made definite carries the prefix al- (الـ). The lam in this prefix follows one of two rules depending on the following letter: it is either pronounced clearly (lam qamariyya, "Qamarya lam") or silently merged into the next letter (lam shamsiyya, "Qamarya lam"). This piece explains both rules, lists the trigger letters, and shows British Muslim students how to apply them.
The two categories
Lam Qamariyya (لام قمرية) — the Lunar Lam
Pronounced clearly. The lam is fully audible.
Triggered by 14 letters: أ ب غ ح ج ك و خ ف ع ق ي م ه.
Mnemonic: the words "ibghi ḥajjaka wa-khaf ʿaqimahu" (ابغ حجك وخف عقيمه) — "Seek your pilgrimage and fear its barren result" — contain all 14 lunar letters.
The reason for the name: the example word al-qamar (the moon) starts with qaf — a Qamari letter. The lam is heard clearly.
Lam Shamsiyya (لام شمسية) — the Shamsya Lam
Silent. The lam is not pronounced. The following letter is doubled (carries shaddah).
Triggered by 14 letters: ت ث د ذ ر ز س ش ص ض ط ظ ل ن.
The reason for the name: the example word al-shams (the sun) starts with shin — a Shamsy letter. The lam disappears; you say "ash-shams".
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How to remember which is which
The 28 Arabic letters are divided exactly in half — 14 lunar, 14 solar. The simplest way to test:
Say the word out loud with the definite article (ال).
If you hear a clear "L" sound, it is qamariyya.
If the next letter is doubled and the L vanishes, it is shamsiyya.
Worked examples
Lunar (lām pronounced)
al-Qurʾān (الْقُرْآن) — qaf is lunar. Say the L.
al-Bayt (الْبَيْت) — baʾ is lunar.
al-Ḥamd (الْحَمْد) — ḥaʾ is lunar. Surah al-Fatihah opens with this.
al-Yawm (الْيَوْم) — yaʾ is lunar.
al-Mulk (الْمُلْك) — mim is lunar.
Solar (lam silent, next letter doubled)
ash-Shams (الشَّمْس) — shin is solar.
ar-Raḥman (الرَّحْمَٰن) — raʾ is solar. Critical for Bismillah.
as-Salam (السَّلَام) — sin is solar.
aṣ-Ṣiraṭ (الصِّرَاط) — ṣad is solar. Surah al-Fatihah verse 6.
an-Nas (النَّاس) — noon is solar.
The Bismillah case
Every Bismillah includes two solar lam applications:
ar-Rahman — raʾ is solar. Lam disappears; raʾ is doubled.
ar-Raḥīm — same. Lam disappears; raʾ is doubled.
Surah al-Fatihah verse 6 contains: ihdina ṣ-ṣiraṭa l-mustaqim — both a solar lām (in aṣ-Siraṭ) and a lunar lam (in al-mustaqim).
Why these names?
Classical Arab grammarians chose the example words deliberately. Al-shams (the sun) opens with a solar letter; al-qamar (the moon) opens with a lunar letter. The naming makes the rule self-illustrating — the moon-name shows you what to do; the sun-name shows you what to do. The online learners, students and tutors are kid, adult male and female Muslims worldwide who are non-native speakers of Arabic.
Common British Muslim mistakes
Pronouncing the L in solar words. Saying "al-shams" instead of "ash-shams". This is the most common error — Western-educated Muslims who never learnt the rule often default to pronouncing every L.
Skipping the shaddah on the doubled letter. Even if you correctly drop the L, you must double the following letter — "ash-shams" not "a-shams".
Not using the rule with the same consistency. Many British Muslim adults get half the words right and half wrong. The fix is one focused drill week. The online teachers at E-aalim are dedicated, efficient and experienced al-Azhar graduates.
Drilling the rule
Memorise the mnemonic: ibghi hajjaka wa-khaf ʿaqimahu for lunar letters. Solar letters are the remaining 14.
Drill on al-Fatihah: identify each al- in the surah. Apply the rule. Recite 10 times daily for a week.
Drill on the 99 Beautuful Names: of Allah, the divine names alternate solar and lunar. Excellent practice.
Listen to a master qari: notice how the L vanishes for solar letters and rings out for lunar letters.
Get corrected: half-applied rules sound wrong but students often cannot self-detect.
The wider lam family
The lam of verbs and prepositions — almost always tarqiq
Why this matters for British Muslim families
The (al)- prefix appears thousands of times in the Qur'an. A British Muslim who masters solar/lunar lām removes a substantial portion of the most common tajweed error in one rule. Surah al-Fatihah alone — recited 17 times daily in obligatory salah — contains multiple applications. Get this right and your daily prayer becomes phonetically correct.
Closing
Solar and lunar lām is the second-easiest tajweed rule to learn (after izhar) and one of the most rewarding. Book a free Eaalim trial with an Al-Azhar teacher who can drill you through the 28 letters until the rule becomes automatic.
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ShareFrequently Asked Questions
Two rules for the lām of the definite article (al-). Solar lām (شمسية) — silent, with the next letter doubled — for 14 letters. Lunar lām (قمرية) — clearly pronounced — for the other 14 letters.
Mnemonic for lunar: "ibghi ḥajjaka wa-khaf ʿaqīmahu" (ابغ حجك وخف عقيمه) contains all 14 lunar letters. Solar letters are the remaining 14.
The example word for solar lām is al-shams (the sun) — shīn is solar, the L vanishes. The example for lunar is al-qamar (the moon) — qāf is lunar, the L is heard. The names self-illustrate.
ar-Raḥmān, ar-Raḥīm — both contain solar lām (rāʾ is solar). The L is silent; the rāʾ is doubled.
Lunar — ḥāʾ is lunar. The L is pronounced clearly.
Solar — ṣād is solar. The L is silent; the ṣād is doubled. Then "al-mustaqīm" — lunar; the L is heard.
Pronouncing the L in solar words — saying "al-shams" instead of "ash-shams". Western-educated Muslims who never learnt the rule often default to pronouncing every L.
Sūrat al-Fātiḥah is the foundation drill. Then practise on the 99 Names of Allah, which alternate solar and lunar. Book a free Eaalim trial for guided drilling.
