Word: shutdown
The action of stopping operations; a closing, of a computer, business, event, etc. Example: You need to enter your password at startup, but it's not required at shutdown.
A statement, insult, etc. that prevents the opponent from replying further. Example: When he insulted me, my reply was such a shutdown that he left the room.
An autistic response to stress, etc. where the individual becomes silent and motionless.
You can find a list of possible crossword clues for SHUTDOWN below.