Daily Chinese Idiom Guessing Game
To be at a loss; not knowing what to do; perplexed.
措安置，处理。不知道怎么办才好。形容处境为难或心神慌乱。
《论语·子路》则民无所措手足。”《三国志·吴书·诸葛恪传》哀喜交并，不知所措。”
When the teacher asked a sudden question, he stood there not knowing what to do.