الحرارة مناسبة، انما الميه ماغليتش.

Because in Arabic, the present-tense to be is usually omitted.

So الحرارة مناسبة literally looks like the heat/temperature suitable, but it means the temperature is suitable or the heat is right.

This is very normal in both Standard Arabic and Egyptian Arabic.

• الحرارة مناسبة = the temperature is suitable
• الميه سخنة = the water is hot

If you wanted past tense, then a form of كان would appear:

• الحرارة كانت مناسبة = the temperature was suitable

Because it describes الحرارة, and الحرارة is a feminine noun.

In Arabic, adjectives agree with the noun they describe in gender and number. So:

• حرارة مناسبة = suitable temperature/heat
• not حرارة مناسب

The feminine ending here is ـة.

Because مناسبة here is not being used like a regular attributive adjective inside a noun phrase. It is the predicate of the sentence.

So the structure is:

• الحرارة = the subject
• مناسبة = the predicate, telling you something about the subject

In Arabic, predicate adjectives in sentences like this are normally indefinite.

Compare:

• الحرارة المناسبة = the suitable temperature
  Here مناسبة is an adjective directly modifying the noun, so it is definite.

But:

• الحرارة مناسبة = the temperature is suitable
  Here مناسبة is the predicate, so it stays indefinite.

Here انما means something like but, however, or except that.

So the sentence is contrasting two facts:

• الحرارة مناسبة = the temperature is suitable
• انما الميه ماغليتش = but the water didn’t boil / hasn’t boiled

It is functioning as a contrast word.

Egyptians often use بس more commonly in everyday speech for but.

So a very natural everyday version would be:

• الحرارة مناسبة، بس الميه ماغليتش

انما is understandable and used, but it can sound a bit more deliberate or formal depending on the speaker and context.

So:

• بس = very common conversational but
• انما = also used, often with a slightly stronger contrastive feel

Yes. الميه is the Egyptian Arabic word for water, corresponding to Standard Arabic الماء.

A learner will very often see:

• Egyptian: ميه / الميه
• Standard Arabic: ماء / الماء

So in this sentence:

• الميه = the water

This is one of the very common everyday Egyptian words that differs from Standard Arabic.

Arabic often uses the definite article where English may use no article.

Here الميه means the water, but in natural English we might simply say water if the context is obvious.

In Arabic, using الـ is natural when both speaker and listener know which water is being talked about, for example the water in the pot or kettle.

So:

• الميه = the water we’re talking about

This is the verb غليت with Egyptian negation wrapped around it.

The negation pattern is:

• ما + verb + ش

So:

• غليت = it boiled / she boiled
• ما غليتش = it didn’t boil / she didn’t boil

This ما...ش negation pattern is extremely common in Egyptian Arabic.

Other examples:

• ماعرفش = I don’t know / he didn’t know, depending on context and form
• ماجاش = he didn’t come
• ماعملتش = she didn’t do / I didn’t do, depending on the verb form

Because the subject الميه is grammatically feminine, and the verb is agreeing with it.

The positive form here is:

• الميه غليت = the water boiled

Then negation gives:

• الميه ما غليتش = the water didn’t boil

So the ت is not part of the negation itself. It is part of the feminine past-tense verb form.

This is a very useful thing to notice:

• الشاي غلي = the tea boiled
• الميه غليت = the water boiled

So غلي and غليت differ because of gender agreement.

It can mean either, depending on context.

In many situations, Egyptian Arabic uses this kind of past negation where English might use either:

• didn’t boil
• hasn’t boiled

If you want to make not yet very explicit, Egyptians often add لسه:

• الميه لسه ما غليتش = the water still hasn’t boiled yet

So in your sentence, the idea is probably:

• The temperature is right, but the water hasn’t boiled yet

It is really two different clause types joined together:

1. الحرارة مناسبة
   This is a nominal sentence: noun + predicate, with no present-tense is.

2. انما الميه ماغليتش
   This contains a verb: غليت / ما غليتش

So one useful way to understand the structure is:

• first clause: describing a state
• second clause: describing an event that has not happened

That is a very common pattern in Arabic.

A very natural everyday version would be:

• الحرارة مناسبة، بس الميه لسه ما غليتش.

That adds two very conversational features:

• بس instead of انما
• لسه to make not yet explicit

So if your goal is very natural spoken Egyptian, that version may sound more everyday.