ダウン

noun (common) (futsuumeishi); noun or participle which takes the aux. verb suru

going down; fall; decrease; drop
knocking down (in boxing); flooring; being knocked down; being floored
being out of action (due to illness, exhaustion, etc.); being down (e.g. with a cold); being knocked out (from alcohol); being out of it; collapsing
going down (of a computer system, server, etc.); crashingcomputing

noun (common) (futsuumeishi)