たたかい
war, battle
戦う stopped just short of being a verb. Not the fighting: the thing itself, with a name and a date and a field somebody can point at. The same attacker たたか, now in a history book: たたかい.
戦う たたかう is to fight. 戦い is the fight as a noun, and 戦争 せんそう is a war.
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