التغيير مهم.

A natural Egyptian-style pronunciation is:

et-taghyīr mohemm

A few notes:

• ال before ت is pronounced with assimilation, so you hear et-t..., not el-t...
• غ in تغيير is a deep throaty sound, often approximated as gh
• مهم in Egyptian speech is commonly pronounced mohemm rather than the more formal muhimm

So if you say et-taghyīr mohemm, you’ll sound natural.

Because Arabic often uses nominal sentences in the present tense without a separate word for is / am / are.

So:

• التغيير مهم literally looks like the change important but it means change is important or the change is important, depending on context.

This is completely normal in Arabic. In the present tense, you usually just put the subject and the description together.

ال is the Arabic definite article, equivalent to the.

So:

• تغيير = change / changing
• التغيير = the change / change in a general, abstract sense

In Arabic, abstract nouns often appear with ال when talking about a concept in general. So التغيير can mean not only the change, but also change as an idea.

Because ت is a sun letter.

When ال comes before a sun letter, the l sound of ال disappears in pronunciation, and the next consonant gets doubled.

So:

• written: التغيير
• pronounced: et-taghyīr or it-taghyīr

This happens in pronunciation only. The spelling stays ال.

Other common examples:

• الشمس → esh-shams
• الناس → en-nās
• التاني → et-tāni

Because مهم is the predicate of the sentence, and in this kind of Arabic sentence the predicate is usually indefinite.

So the structure is:

• التغيير = the topic / subject
• مهم = important

If you made both words definite, it would sound different and usually less natural in this simple sentence.

So:

• التغيير مهم = Change is important is the normal form.

It works in both.

That’s one reason it’s a useful beginner sentence.

• In Modern Standard Arabic, it is fully correct.
• In Egyptian Arabic, it is also natural, especially in speech or writing that is a bit careful or educated.

The main difference is pronunciation:

• MSA-style: at-taghyīru muhimmun if fully vocalized
• Egyptian-style: et-taghyīr mohemm

So the wording stays the same, but the pronunciation changes.

التغيير is a verbal noun or masdar. It means change or changing.

It comes from the verb:

• غيّر = to change / to alter

So:

• غيّر = he changed
• التغيير = changing / change

This pattern is very common in Arabic: a verb can produce a noun that expresses the action or concept.

مهم is an adjective meaning important.

Yes, it can change depending on gender and number.

Examples:

• التغيير مهم = change is important
• الفكرة مهمة = the idea is important
• الناس مهمين = the people are important (Egyptian Arabic)

So in your sentence, مهم is masculine singular because it matches التغيير, which is grammatically masculine singular.

Usually, for a simple sentence like this, التغيير مهم is the most natural order.

That order is:

• subject/topic first
• description second

If you say مهم التغيير, it sounds marked, poetic, or context-dependent rather than neutral everyday speech.

So for normal use, stick with:

التغيير مهم

Because Arabic is normally written without short vowels in everyday texts.

So you see:

• التغيير مهم

But in fully vocalized formal Arabic, it could be written something like:

• التغييرُ مهمٌّ

In Egyptian Arabic, people almost never write all those vowel marks in normal writing. Learners have to get used to reading words without them.

In Egyptian Arabic, the natural negative is:

التغيير مش مهم

Pronounced:

et-taghyīr mesh mohemm

Here:

• مش = not
• مهم = important

So this is the everyday Egyptian way to negate the sentence.