不知所措 bù zhī suǒ cuò

DEFINITIONS

  1. not knowing what to do (idiom); at one's wits' end
  2. embarrassed and at a complete loss

CHARACTERS

不 bù no, not; un-; negative prefix
知 zhī know, perceive, comprehend
所 suǒ place, location; numerary adjunct
措 cuò place; collect, arrange; employ