السيطرة مهمة.

In Arabic, the present tense of to be is usually not written or spoken in simple sentences like this.

So:

• السيطرة مهمة
• literally: control important
• natural English: Control is important

This is a very common Arabic sentence pattern called a nominal sentence. In the present tense, Arabic normally leaves out is / am / are.

If you wanted a past or future meaning, Arabic would use other words, for example:

• كانت السيطرة مهمة = Control was important
• ستكون السيطرة مهمة = Control will be important

The sentence has two parts:

• السيطرة = the topic / subject
• مهمة = the description / predicate

So the structure is:

• السيطرة = control
• مهمة = important

Together: Control is important.

In traditional grammar terms:

• السيطرة is the مبتدأ (the thing being talked about)
• مهمة is the خبر (what is being said about it)

The ending ـة is called taa marbuuTa (ة). It often marks a word as feminine.

Here, مهمة is the feminine form of important.

Compare:

• مهم = important (masculine)
• مهمة = important (feminine)

Since السيطرة is treated as a feminine noun, the adjective/predicate must match it, so Arabic uses:

• السيطرة مهمة

not

• السيطرة مهم

Because سيطرة ends in ـة (taa marbuuTa), which very often indicates a feminine noun.

So Arabic treats سيطرة as grammatically feminine, and anything describing it should usually agree with it in gender.

That is why the sentence uses:

• مهمة rather than مهم

This is grammatical gender, not biological gender. Abstract nouns are often feminine in Arabic.

ال is the Arabic definite article, usually meaning the.

So literally, السيطرة can mean:

• the control
• the domination
• the mastery, depending on context

But with abstract nouns, Arabic often uses the definite form where English might use a more general translation. So السيطرة مهمة can naturally be understood as:

• Control is important

not only:

• The control is important

In other words, Arabic often makes abstract ideas definite in places where English does not.

In this kind of sentence, the predicate is usually indefinite.

So:

• السيطرة مهمة = Control is important

This is the normal pattern:

• definite subject/topic
• indefinite predicate

If you said السيطرة المهمة, that would usually no longer be a full sentence. It would sound more like a noun phrase:

• the important control or
• the important domination

So:

• السيطرة مهمة = a complete sentence
• السيطرة المهمة = a phrase, not the same meaning

The usual pronunciation is approximately:

• as-sayṭarah

Here, the ل of ال is not pronounced separately, because س is a sun letter. The l sound assimilates to the following consonant.

So:

• written: السيطرة
• pronounced: as-sayṭarah

A rough full pronunciation of the sentence is:

• as-sayṭarah muhimmah

A few pronunciation notes:

• س = like s
• ي here helps form say
• ط is an emphatic t
• ة at the end is usually pronounced like -ah when pausing

In fully vowelled formal Arabic, the word could be written:

• مهمّةٌ

That final ـٌ marks indefinite nominative case, often heard as -tun in careful reading, though in pause it is often not fully pronounced.

However, in normal everyday writing, short vowels and case endings are usually omitted, so you simply see:

• مهمة

The same is true for السيطرة. In fully vowelled Arabic, it could appear as:

• السَّيطرةُ مهمّةٌ

But in ordinary text, these endings are usually left unwritten.

Yes, but the most natural neutral form here is:

• السيطرة مهمة

You may also see different word orders in Arabic depending on style, emphasis, or context, but for a simple beginner sentence, this order is the standard one for a nominal sentence:

• topic first
• description second

So a learner should be comfortable recognizing:

• السيطرة مهمة = Control is important

Yes. Depending on context, سيطرة can mean things like:

• control
• domination
• command
• mastery

So السيطرة مهمة could be understood differently depending on the topic:

• in management: Control is important
• in politics: Domination is important
• in a skill context: Mastery is important

The exact English translation depends on context, but the grammar of the sentence stays the same.

The dictionary forms are:

• سيطرة = control / domination
• مهم = important (masculine base form)

The feminine form used in the sentence is:

• مهمة

So when looking words up, it is useful to know that adjectives are often listed in the masculine singular form, even if the sentence uses the feminine form.