不知所措 bùzhī-suǒcuò not knowing what to do (idiom)
not knowing what to do (idiom); at one's wits' end; embarrassed and at a complete loss
How to remember 不知所措: 不 not + 知 know + 所 place + 措 to arrange = not knowing what to do (idiom).
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How it is used
- At a total loss, not knowing how to react - 他突然发火，我不知所措 (tā tūrán fāhuǒ, wǒ bùzhī-suǒcuò) he suddenly lost his temper and I didn't know what to do.
- Describes flustered helplessness in the moment, often from surprise or pressure; used as a predicate about a person.
- Contrast 手足无措 (shǒuzú-wúcuò), a near-synonym stressing physical panic; both are written/formal register.