المخدر الموضعي جاهز.

Because Arabic normally leaves out the verb to be in the present tense.

So:

• المخدر الموضعي جاهز = The local anesthetic is ready

There is no separate word for is here. This is called a nominal sentence in Arabic.

If you wanted the past tense, you would usually use كان:

• كان المخدر الموضعي جاهزًا = The local anesthetic was ready

A useful pronunciation guide is:

• al-mukhaddir al-mawḍiʿī jāhiz

A few sounds may be unfamiliar:

• خ in مخدر is like the ch in German Bach or Scottish loch
• ض in موضعي is a deep/emphatic d
• ع in موضعي is a throat sound with no exact English equivalent
• ج in جاهز is usually pronounced j in Modern Standard Arabic

Also, the l in ال is pronounced here, because م is a moon letter, not a sun letter.

المخدر الموضعي is the subject phrase, meaning the local anesthetic.

It is made of:

• المخدر = the anesthetic
• الموضعي = local

So together:

• المخدر الموضعي = the local anesthetic

Then جاهز tells us something about it: ready.

Because adjectives usually come after the noun in Arabic.

So:

• المخدر الموضعي literally follows the pattern the anesthetic local

But in natural English, we translate it as:

• the local anesthetic

This noun-then-adjective order is very normal in Arabic.

Because in Arabic, an adjective must agree with the noun it describes in definiteness.

Since المخدر is definite (the anesthetic), the adjective must also be definite:

• المخدر الموضعي

If the noun were indefinite, the adjective would also be indefinite:

• مخدر موضعي = a local anesthetic

This is a very important pattern in Arabic adjective phrases.

Because جاهز is not part of the noun phrase the local anesthetic. It is the predicate of the sentence, meaning it tells us something about the subject.

So the structure is:

• المخدر الموضعي = subject
• جاهز = predicate adjective

That is why جاهز does not need ال.

Compare:

• المخدر الموضعي جاهز = The local anesthetic is ready
• المخدر الموضعي الجاهز = the ready local anesthetic

In the second example, الجاهز is an adjective directly describing the noun, so it becomes definite too.

Yes. It agrees in gender and number.

Here, المخدر is:

• masculine
• singular

So the predicate adjective is also masculine singular:

• جاهز

If the noun were feminine, you would usually use:

• جاهزة

For example:

• الحقنة جاهزة = The injection is ready

Yes. مخدر can mean anesthetic, but depending on context it can also refer to a narcotic or drug.

In this sentence, because it is followed by الموضعي (local/topical), the meaning is clearly medical:

• المخدر الموضعي = the local anesthetic

So context matters a lot with this word.

الموضعي means local or topical, especially in medical contexts.

So in:

• المخدر الموضعي

it means an anesthetic applied to a specific place or area, not one that affects the whole body.

You may see موضعي in other medical phrases too, such as:

• علاج موضعي = topical treatment
• استخدام موضعي = local/topical use

A fully vowelled version would be:

• المُخَدِّرُ المَوْضِعِيُّ جاهِزٌ

In careful grammatical terms:

• المُخَدِّرُ is nominative
• المَوْضِعِيُّ matches it as an adjective
• جاهِزٌ is also nominative as the predicate

In normal modern writing, these short vowels are usually omitted, so you normally see:

• المخدر الموضعي جاهز

The most basic and natural order here is:

• المخدر الموضعي جاهز

This is the usual subject + predicate order.

In some contexts, Arabic can move things around for style or emphasis, but for a learner, this is the best standard pattern to use.

So if you want to say The local anesthetic is ready, this sentence is the straightforward form to remember.