المرهم جديد.

A natural Egyptian pronunciation is:

el-marham gedīd

A few useful notes:

• ال is usually pronounced el- in Egyptian Arabic, not al-.
• مرهم is marham.
• جديد is pronounced gedīd in Egyptian, because ج is usually pronounced like a hard g in Cairo-style Egyptian Arabic.

So the full sentence sounds like:

el-marham gedīd

Because Arabic often uses a nominal sentence in the present tense.

In English, you say:

• The ointment is new.

In Arabic, the present-tense to be is usually not spoken in sentences like this. So Arabic simply says:

• المرهم جديد
• literally: the ointment new

This already means The ointment is new.

If you wanted past or future, Arabic would use other words, but in the simple present, the is/am/are is normally omitted.

In Arabic, words describing a noun usually come after the noun, not before it.

So while English says:

• new ointment

Arabic says:

• مرهم جديد
• literally: ointment new

In your sentence, جديد is functioning as the predicate of the sentence, so it still comes after المرهم.

This is a very important point.

There is a difference between:

1. المرهم جديد = The ointment is new
2. المرهم الجديد = the new ointment

In المرهم جديد:

• المرهم is the subject: the ointment
• جديد is the predicate: new

Because جديد is not being used as part of a noun phrase like the new ointment, it does not take الـ here.

But in المرهم الجديد, the adjective is directly describing the noun inside one phrase, so both become definite.

So:

• المرهم جديد = The ointment is new
• المرهم الجديد = the new ointment

الـ is the Arabic definite article, equivalent to the in English.

So:

• مرهم = an ointment / ointment
• المرهم = the ointment

In Egyptian Arabic, الـ is usually pronounced el-.

The written sentence المرهم جديد works in both Modern Standard Arabic and Egyptian Arabic.

What changes most clearly is the pronunciation:

• In MSA: al-marham jadīd
• In Egyptian: el-marham gedīd

So the spelling is the same, but the spoken form differs.

مرهم is treated as masculine.

That matters because adjectives in Arabic usually agree with the noun in gender and number.

Since مرهم is masculine singular, the adjective is also masculine singular:

• مرهم جديد = a new ointment
• المرهم جديد = The ointment is new

If the noun were feminine, the adjective would normally change form.

The adjective would usually take the feminine ending ـة.

For example:

• الكريم جديد = The cream is new if كريم is treated as masculine
• الشنطة جديدة = The bag is new because شنطة is feminine

So with a feminine noun, جديد becomes جديدة.

Not by itself.

المرهم جديد most directly means:

• The ointment is new

If you want this ointment, Egyptian Arabic often says:

• المرهم ده جديد = This ointment is new

Here:

• ده = this for a masculine noun

So المرهم جديد is about the ointment, not specifically this ointment, unless the context makes that clear.

It is a complete and normal sentence.

Arabic does not need a spoken present-tense is, so المرهم جديد is fully complete.

A native speaker would understand it as a normal statement meaning:

• The ointment is new

Yes, they can. المرهم جديد is understandable and natural.

In everyday Egyptian speech, people might also say things like:

• المرهم ده جديد = This ointment is new
• ده مرهم جديد = This is a new ointment

So your sentence is correct, but in real conversation speakers often add words like ده depending on context.

They are different structures:

• مرهم جديد = a new ointment
  This is a noun phrase, not a full sentence by itself in most contexts.

• المرهم جديد = The ointment is new
  This is a full sentence.

So the presence of الـ on المرهم helps make it the subject of a complete statement here.

In fully vowelled Modern Standard Arabic, you might see:

• المرهمُ جديدٌ

But in normal Arabic writing, especially everyday writing and Egyptian-style writing, short vowels and tanween are usually not written.

So جديد without tanween marks is completely normal in ordinary text.

Its main meaning is new, but like English new, the exact sense depends on context.

It can mean:

• newly made
• recently bought
• not old
• recently introduced

So in المرهم جديد, the meaning is usually just The ointment is new, but context tells you whether that means newly purchased, newly opened, recently released, and so on.

In Egyptian Arabic, a common negative is:

• المرهم مش جديد = The ointment isn’t new

Here:

• مش = not / isn’t

So the pattern is very simple:

• المرهم جديد = The ointment is new
• المرهم مش جديد = The ointment is not new

A very natural yes/no question would be:

• المرهم جديد؟ = Is the ointment new?

Arabic often uses intonation to make this a question, just like English sometimes does.

You could also ask more explicitly:

• هو المرهم جديد؟

But the simple spoken question المرهم جديد؟ is very common and natural in context.