التصليح غالي بس مهم.

A natural Egyptian pronunciation is it-tasliiH ghaali bass mohemm.

A few notes:

• التصليح → it-tasliiH or et-tasliiH
• غالي → ghaali
• بس → bass
• مهم → mohemm

Some sounds may feel new:

• غ is a throaty sound, a bit like the French r
• ص is a heavier, deeper s
• ح is a strong breathy h

Because of sun-letter assimilation.

The word begins with الـ, the definite article, but the next letter is ت, which is a sun letter. In Arabic, when الـ comes before a sun letter, the l sound disappears and the next consonant gets doubled.

So:

• ال + تصليح
• becomes pronounced at-/it-/et- + tasliiH
• so you hear it-tasliiH

This is a very common pattern in Arabic pronunciation.

التصليح means the repair, the fixing, or repairing, depending on context.

It comes from the verb صلّح, which means to fix or to repair.

So this noun is basically the action or process of fixing something:

• صلّح = he fixed
• تصليح = repairing / repair

In Egyptian Arabic, تصليح is a very common everyday word.

In Arabic, present-tense sentences like this usually do not use a separate word for is.

So:

• التصليح غالي literally looks like the repair expensive
• but it naturally means the repair is expensive

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

If you wanted was, then Arabic would use a verb:

• التصليح كان غالي = the repair was expensive

Because they are not just ordinary adjectives inside a noun phrase here. They are part of the predicate of the sentence.

The structure is:

• التصليح = the subject
• غالي = expensive
• بس = but
• مهم = important

So the sentence works like:

• The repair
  • expensive
    • but
      • important

In other words, غالي and مهم are telling us something about التصليح.

Compare these two ideas:

• التصليح غالي = The repair is expensive
• التصليح الغالي = the expensive repair

That second one is a noun phrase, not a full sentence.

Because in this sentence they are predicates, not definite adjectives modifying the noun.

So:

• التصليح غالي = The repair is expensive
• التصليح مهم = The repair is important

If you added الـ to make them definite, the meaning would change and the sentence would no longer sound like this simple X is Y structure.

Compare:

• التصليح الغالي = the expensive repair
• التصليح المهم = the important repair

So without الـ, they work as the description being asserted about the subject.

Because التصليح is grammatically masculine singular, so the words describing it match that.

That is why you get:

• غالي not غالية
• مهم not مهمة

If the noun were feminine, you would usually use the feminine forms:

• الصيانة غالية ومهمة = The maintenance is expensive and important

Agreement like this is very important in Arabic.

Here, بس means but.

So:

• غالي بس مهم = expensive but important

In Egyptian Arabic, بس is extremely common in everyday speech.

Important note: بس can also mean only / just in other contexts. For example:

• بس كده = that’s all / just that

So its exact meaning depends on the sentence. In your example, it clearly means but.

It is very natural in Egyptian Arabic, but most Arabic speakers would still understand it.

What makes it feel especially colloquial is:

• بس for but
• تصليح as an everyday spoken word for repair

In more formal Modern Standard Arabic, you might see something like:

• الإصلاح غالٍ لكن مهمّ or
• التصليح غالٍ لكن مهمّ

So the sentence is colloquial and Egyptian-friendly, but not hard for other Arabic speakers to understand.

Yes. That would still be correct, but the emphasis changes.

Compare:

• التصليح غالي بس مهم = the first thing you hear is that it’s expensive
• التصليح مهم بس غالي = the first thing you hear is that it’s important

So both are fine, but the speaker highlights a different idea first.

That kind of word-order choice is very common in Arabic, just as in English:

• It’s expensive, but important
• It’s important, but expensive