出其不意 chū qí bù yì

DEFINITIONS

  1. to do sth when least expected (idiom); to catch sb off guard

CHARACTERS

出 chū
HSK 1
go out, send out; stand; produce
其 qí
HSK 3
his, her, its, their; that
不 bù
HSK 1
no, not; un-; negative prefix
意 yì
HSK 2
thought, idea, opinion; think