What is the idiom to describe "shrinking and being afraid"?

Timid, timid, hesitant, hesitant, timid.

Be frightened by the sight of someone or something

Pronunciation: Wangér shěng wèI

Sentence making: When the teacher is angry, the serious expression is daunting.

be discreet

Pronunciation: crooked and crooked

Sentence: If you have a clear conscience about this matter, you should explain it clearly to everyone, and don't be timid.

Too cautious and indecisive

Pronunciation: zhā n qiá n gü u

Sentence making: He always looks forward and backward, so he misses many good opportunities.

Flinch at the sight.

Pronunciation: wàngér quèbú.

Sentence making: It is difficult for people who retreat when encountering obstacles to achieve anything.

shilly-shally

Pronunciation: wi su not búQin

Sentence: Don't flinch when you have a chance to make a profit. When you are sure of a deal, give the other party a fatal blow, that is, it is not enough to do it right, but to get as much as possible.