هذا الوقت مناسب.

A simple way to break it down is:

• هذا = this
• الوقت = the time
• مناسب = suitable / appropriate

Together, هذا الوقت works as the subject phrase, and مناسب is what is being said about it. So this is a basic nominal sentence in Arabic.

In Arabic, the present-tense verb to be is usually not stated in sentences like this.

So:

• هذا الوقت مناسب literally looks like this time suitable
• but it naturally means this time is suitable

This is completely normal in Modern Standard Arabic. If you wanted a past or future meaning, then Arabic would use a verb such as كان.

Because الوقت is a masculine singular noun.

In Arabic, demonstratives must match the noun in gender and number:

• هذا = masculine singular this
• هذه = feminine singular this

So:

• هذا الوقت = this time
• but with a feminine noun, you would say something like هذه الساعة = this hour

In Modern Standard Arabic, when a demonstrative like هذا comes before a noun, that noun is usually definite, so it normally takes الـ.

That is why Arabic says:

• هذا الوقت

not usually:

• هذا وقت for the same exact structure

This is a very common pattern in MSA:

• هذا الكتاب = this book
• هذه السيارة = this car

Because here مناسب is the predicate, not an adjective directly attached to الوقت.

There is an important difference:

• هذا الوقت مناسب = This time is suitable
• الوقت المناسب = the suitable time

In the sentence you gave, مناسب is saying something about هذا الوقت. It is not part of one single noun phrase.

It is originally an adjective, but in this sentence it is being used as the predicate of the sentence.

English does this too:

• The book is new
• new is an adjective, but it functions as part of the predicate

Arabic works the same way here:

• هذا الوقت مناسب
• مناسب is an adjective in form, but its job in the sentence is to be the predicate: is suitable

The fully vocalized form is:

هَذَا الْوَقْتُ مُنَاسِبٌ

In careful grammatical Arabic, the endings are:

• الوقتُ with -u because it is nominative
• مناسبٌ with -un because it is also nominative and indefinite

In normal printed Arabic, these short vowel endings are usually not written.

A careful pronunciation is:

hādhā al-waqtu munāsibun

If you pause at the end, which is very common, it is usually pronounced more like:

hādhā al-waqt munāsib

A few useful notes:

• ذ in هذا sounds like the th in this
• ق in الوقت is a deep q sound, not an English k
• the ال in الوقت is pronounced clearly here, because و is a moon letter, not a sun letter

In full MSA grammar, this sentence is in the nominative pattern because it is a nominal sentence with a subject and predicate.

So you get:

• الوقتُ
• مناسبٌ

As for هذا, demonstratives are treated a bit differently in Arabic grammar and do not show the same regular case ending pattern that ordinary nouns do.

For a beginner, the main useful point is this: both the subject phrase and the predicate are in the nominative here.

They are similar, but not exactly the same.

• هذا الوقت مناسب = This time is suitable
• هذا وقت مناسب = This is a suitable time

In the first sentence, this time is the subject. In the second, this stands more by itself, and وقت مناسب means a suitable time.

Both are natural, but the structure and emphasis are slightly different.

The demonstrative and the adjective would need to match.

For example, with الساعة (the hour), which is feminine:

• هذه الساعة مناسبة

Here:

• هذه is the feminine form of this
• مناسبة is the feminine form of مناسب

So Arabic shows agreement in gender very clearly.

Yes. Depending on context, مناسب can also mean things like:

• appropriate
• convenient
• fitting

So هذا الوقت مناسب could be understood in English in slightly different ways depending on the situation, such as:

• This time is suitable
• This is an appropriate time
• This time is convenient

That kind of small meaning shift is very normal with Arabic adjectives.