戦い
たたかい · tatakai · JLPT N3 · noun
battle
⚔️ 戦 = 単 + 戈 (halberd); tatakai is the noun of 戦う tatakau, to fight
The right side of 戦 is 戈, an old halberd radical that also turns up in 戦争 (sensō, war). Tatakai is the noun form of the verb 戦う tatakau, to fight: swap the final -u for -i and the action becomes the battle.