المرآة الجانبية نظيفة.

In Arabic, the present-tense verb to be is usually not stated.

So المرآة الجانبية نظيفة literally looks like:

• the side mirror
• clean

But it means The side mirror is clean.

This is a very common pattern in Arabic called a nominal sentence. If you wanted a past or future meaning, Arabic would use other words, but for simple present statements, is/am/are is normally omitted.

Because adjectives normally come after the noun in Arabic.

So:

• المرآة = the mirror
• الجانبية = side / lateral

Together, المرآة الجانبية means the side mirror.

This is the normal order in Arabic:

• noun first
• adjective second

So Arabic says something closer to the mirror side rather than the side mirror.

Because الجانبية is an adjective directly describing the noun المرآة, while نظيفة is the predicate of the sentence.

Here is the difference:

1. المرآة الجانبية

   • This is a noun phrase: the side mirror
   • The adjective الجانبية must match the noun in definiteness, so it also takes الـ

2. نظيفة

   • This means clean
   • It is not part of the noun phrase the side mirror
   • It is telling us something about the side mirror
   • So it is normally indefinite

That is why Arabic says:

• المرآة الجانبية = the side mirror
• نظيفة = is clean

Because the main noun المرآة is feminine, and Arabic adjectives must agree with the noun they describe.

You can often recognize feminine words by the ending ـة.

Here:

• المرآة = mirror, feminine
• الجانبية = side, feminine form
• نظيفة = clean, feminine form

Since the noun is feminine singular, the adjectives also appear in the feminine singular form.

If the noun were masculine, the adjectives would be masculine too.

This comes from sentence structure.

Arabic often works like this:

• noun + adjective = a noun phrase
• then another word can act as the predicate

So in this sentence:

• المرآة الجانبية = the side mirror
• نظيفة = clean

A big clue is definiteness:

• المرآة is definite
• الجانبية is also definite, matching it
• نظيفة is not definite, so it works as the predicate: is clean

So the sentence naturally divides into:

• المرآة الجانبية | نظيفة
• The side mirror | is clean

It is commonly pronounced something like al-mir'ah in pause.

The hamza ء represents a glottal stop, a brief catch in the throat, like the break in some pronunciations of uh-oh.

So المرآة contains that stop before the final sound:

• mir-'ah

The spelling is a little tricky because of the hamza. This is just something you gradually get used to in Arabic spelling. The important thing for a learner is to notice that this word is not pronounced smoothly like miraa; there is a clear break before the end.

With full case endings, it would be:

الْمِرْآةُ الْجَانِبِيَّةُ نَظِيفَةٌ

A careful grammatical reading would be roughly:

• الْمِرْآةُ = the mirror
• الْجَانِبِيَّةُ = the side
• نَظِيفَةٌ = clean

The endings show the grammar:

• ـُ on المرآة and الجانبية
• ـٌ on نظيفة

But in normal everyday writing, these short vowels are usually omitted, so you normally see:

المرآة الجانبية نظيفة

Yes, in the sense of side-related, lateral, or side as an adjective.

It comes from جانب, which has to do with side.

So:

• مرآة = mirror
• مرآة جانبية = side mirror
• المرآة الجانبية = the side mirror

In English we often use side almost like a noun inside another noun phrase, but in Arabic it is commonly expressed with an adjective after the noun.

Yes, but المرآة الجانبية نظيفة is the most straightforward neutral order.

This standard order is:

• topic / subject first
• description second

So:

• المرآة الجانبية نظيفة = The side mirror is clean

Arabic can sometimes change word order for emphasis or style, but for a learner, this version is the clearest and most natural one to start with.

Because Arabic adjectives change form to match the noun they describe or the subject they refer to.

In English, clean stays the same:

• the mirror is clean
• the car is clean
• the door is clean

But in Arabic, the adjective changes depending on gender and number.

Here the subject is المرآة الجانبية, which is feminine singular, so the predicate adjective is also feminine singular:

• نظيفة = clean, feminine singular

If the noun were masculine singular, you would expect نظيف instead.