當機

to crash (of a computer) / to stop working / (loanword from English "down")

to be / to act as / manage / withstand / when / during / ought / should / match equally / equal / same / obstruct / just at (a time or place) / on the spot / right / just at

at or in the very same... / suitable / adequate / fitting / proper / to replace / to regard as / to think / to pawn / (coll.) to fail (a student)

(bound form) machine; mechanism / (bound form) aircraft / (bound form) an opportunity / (bound form) crucial point; pivot / (bound form) quick-witted; flexible / (bound form) organic

to make prompt decisions (idiom)