expression
unable to fight; incapacitated; knocked out
Primarily used in video games and RPG contexts to describe a character who has lost all HP and can no longer act. Can also refer to being unconscious or dead in a broader sense, but the core meaning is combat incapacitation.
ボス戦でパーティ全員が戦闘不能になった。
The whole party was incapacitated in the boss fight.
この状態異常
This status ailment is treated the same as being unable to fight.