"My sister is amazing."

Translation: أُخْتي مُمْتازة.

[Mar145211]

الاصح ان نقول : أُخْتي مُذْهِلَة

[AMS118784]

What is the difference between "muzhila" and "mumtaaz"? What does "an" mean?

[omarshaban8]

Muthhila (مذهلة) literally means amazing, originating from اذهال (to shock/amaze)

Mumtaaza would be much closer to "excellent". If I say something right in class, the teacher would then say ممتاز and move on. It's what you'd use to describe an object or a situation, for example a piece of steak. Not often used to describe people however, but it may happen occasionally.

An (ان) here is a particle (حرف) which I'd say is a close equivalent to "to" in English. E.g.

You can't say "it is better say amazing" but adding the "to" gives meaning to the sentence. "It is better to say amazing"