Reading · Lesson 6 · 6 min
Sun & Moon Letters
How ال assimilates — and why Israeli maps already taught you the rule
Arabic has one definite article for everything: ال (al-), glued to the front of its noun. No gender, no number, no exceptions — الْبَيْت is 'the house' the way הבית is. You already know this prefix from years of headlines and maps: אלג'זירה, אל-קודס, אינשאללה. The only wrinkle is what happens to that ل — and the wrinkle will feel like home.
Sun letters — the ل melts
Before 14 of the 28 letters, the ل of the article assimilates: it is still written, but you pronounce the next letter doubled instead. الشَّمْس is spelled a-l-sh-m-s but read ash-shams — and the shadda on the ش is the giveaway. These 14 are the sun letters, named after شَمْس itself. The other 14 keep the l crisp — moon letters, after قَمَر, 'moon': الْقَمَر, al-qamar.
| Arabic | Sounds like | Historical Hebrew cousin |
|---|---|---|
| ت | t | ת |
| ث | th | ש (of שָׁלוֹשׁ) |
| د | d | ד |
| ذ | dh | ז (of זָהָב) |
| ر | r | ר |
| ز | z | ז |
| س | s | ש / ס |
| ش | sh | שׂ |
| ص | ṣ | צ |
| ض | ḍ | צ (of אֶרֶץ) |
| ط | ṭ | ט |
| ظ | ẓ | צ (of צָהֳרַיִם) |
| ل | l | ל |
| ن | n | נ |
Do not memorize that list — feel it. Say l, and notice where your tongue tip lands. Every sun letter lives in that same neighborhood: teeth and tongue tip. The ل simply cannot be bothered to lift off and re-land a millimeter away, so it surrenders and doubles the neighbor. Moon letters — made with the lips (ب م), the throat (ع ح ء ه), the back of the mouth (ك ق غ خ ج) — are far enough away that the l survives the trip.
Sun letters in action — written al-, said a-
- الشَّمْسא-שמסash-shams
the sun
הַשֶּׁמֶשׁ هَاشِمِشhashemesh
The proof word itself. Tiberian Hebrew hash-shemesh and Arabic ash-shams double the same letter in the same word — identical behavior, whatever its ultimate origin.
- السَّلَامא-סלאםas-salām
the peace
הַשָּׁלוֹם هَاشَالُومhashalom
As in عَلَيْكُمُ السَّلَام — the s doubles, the l vanishes.
- التَّمْرא-תמרat-tamr
the dates
הַתָּמָר هَاتَامَارhatamar
Hebrew תָּמָר is the same word — at-tamr, the date palm's fruit.
- النُّورא-נורan-nūr
the light
n is a tongue-tip sound, so: an-nūr, never al-nūr.
Moon letters keep the ل
- الْقَمَرאל-קמרal-qamar
the moon
q is made at the back of the mouth — miles from ل — so the article stays intact.
- الْبَيْتאל-ביתal-bayt
the house
הַבַּיִת هَابَايِتhabayit
b lives on the lips: al-bayt.
- الْكِتَابאל-כתאבal-kitāb
the book
- الْعَيْنאל-עיןal-ʿayn
the eye; the spring
הָעַיִן هَاءَايِنha'ayin
ʿayn is a throat letter — moon. Think of all the springs called עין... on Arabic maps they are عين too.
| Arabic | Say it | On Israeli maps and news | Sun or moon? |
|---|---|---|---|
| الْقُدْس | al-quds | אל-קודס | moon — the l stays |
| النَّاصِرَة | an-nāṣira | א-נאצרה | sun — the l melts |
| الطُّور | aṭ-ṭūr | א-טור | sun |
| الْخَلِيل | al-khalīl | אל-ח'ליל (חברון) | moon |
| الشَّيْخ | ash-shaykh | א-שיח' (שארם א-שיח') | sun |
Self-test: הר הזיתים appears on Arabic maps as جَبَل الزَّيْتُون, 'mount of the olives'. Sun or moon? Feel for it: ز is a tongue-tip z — sun. So it reads jabal az-zaytūn. (And yes, זַיִת and زَيْتُون are the same ancient olive.)