رائع!

It is pronounced rāʾiʿ.

A rough breakdown:

• ر = an r sound, usually tapped or lightly rolled
• ا = a long ā sound, like aa
• ئ = a hamza (ʾ), a glottal stop, followed by i
• ع = ʿayn, a throat sound that has no exact English equivalent

So it sounds roughly like raa-iʿ, but with a clear stop in the middle and the final ʿayn at the end.

Yes. In Arabic, just as in English, a single word can be used as an exclamation.

So رائع! works like:

• Wonderful!
• Excellent!
• Great!

If you want to state the subject explicitly, you could say:

• هذا رائع = This is wonderful

It is originally an adjective.

Its basic grammatical role is to describe a noun, for example:

• كتاب رائع = a wonderful book

But it is also very commonly used by itself as an exclamation, especially in speech and informal writing:

• رائع!

So in this sentence, it is an adjective being used exclamatively.

Because رائع here is not saying the wonderful one. It is just an indefinite descriptive word used as an exclamation.

Compare:

• رائع! = Wonderful!
• الكتاب الرائع = the wonderful book

So leaving out ال is completely normal here.

That letter is a hamza written on a yāʾ seat.

The fully vocalized form is رَائِع. The hamza has an i vowel here, and in Arabic spelling, a hamza with kasra is usually written on ئ.

So:

• ئ here does not mean there is a separate y sound
• it is simply the correct way to write the hamza in this word

Its root is usually given as ر-و-ع.

It is related to the verb راعَ, and رائع is the active participle pattern, similar to words like:

• قائل from قال

This is why learners sometimes notice that the spelling does not look completely straightforward: it comes from a root with a weak middle consonant.

Yes. Like other Arabic adjectives, it changes to match what it describes.

Common forms:

• رائع = masculine singular
• رائعة = feminine singular
• رائعون / رائعين = masculine plural
• رائعات = feminine plural

Examples:

• فيلم رائع = a wonderful film
• فكرة رائعة = a wonderful idea

As a standalone exclamation, رائع! is very common, but if you are clearly reacting to a feminine noun, you may also hear or use رائعة!

Because normal Arabic writing usually leaves short vowels unwritten.

So you usually see:

• رائع

In fully vocalized text, you might see:

• رَائِع

And in fully case-marked formal grammar contexts, it could be analyzed as:

• رائعٌ

But in ordinary writing, leaving off those marks is completely standard.

It is a standard Arabic word and fits perfectly well in Modern Standard Arabic.

It is also widely understood and commonly used in many spoken varieties of Arabic, often with the sense of:

• great
• wonderful
• awesome

So it is a very useful word to learn because it works well in both formal and everyday contexts.