- 手足无措 [shǒu zú wú cuò]
- have no idea [not to know] what to do with one's hands and feet; at a loss what to do; be bewildered; confused; discomposed; disconcerted; feel completely at a loss; in discomfiture; perplexed
A man who has become conditioned to the life in the country may feel quite at a loss in the city.
She's finding it difficult to face up to the possibility of an early death.
I'm all at sea; I've no idea how to repair cars.