Question 1

Why doesn't the word for glass (زجاج) have the definite article ال (al-) if the translation says "the car's glass"?

Accepted Answer

This is the core rule of the Arabic possessive construction, called an Idafa. In this structure, the first word (the possessed thing, زجاج) never takes the prefix ال (al-). Instead, it borrows its "the" meaning from the second word (السيارة).

Question 2

How can I tell that زجاج السيارة means "the car's glass" and not "the glass car"?

Accepted Answer

If "car" were an adjective describing the glass, it would have to match the first word exactly. Since زجاج lacks ال and السيارة has it, they don't match. A noun without ال followed directly by a noun with ال is the standard formula for an Idafa (meaning "the [noun 1] of the [noun 2]").

Question 3

Does the word "on" (على) change the grammar of the possessive phrase?

Accepted Answer

Yes, it affects the first word of the phrase! The preposition على forces the word immediately after it (زجاج) to take a "kasra" (an "i" sound, making it zujaaji). The second word in an Idafa (السيارة) always takes a kasra anyway, so it also ends with an "i" sound (as-sayyaarati).

Question 4

I don't see a word for "is" in this sentence. How does that work?

Accepted Answer

Arabic doesn't use a "to be" verb (like "is" or "are") for simple present tense sentences. You simply state the subject, الرخصة (the license), followed immediately by the phrase على زجاج السيارة (on the car's glass). Putting a subject and its location side-by-side forms a complete sentence automatically.

الرخصة على زجاج السيارة.

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