戦(たたか)うto make war (on), to wage war (against), to go to war (with), to fight (with), to do battle (against), to compete (against), to struggle (against adversities, etc.), to contend, to resist

辞書の定義

「う」で終わる五段動詞, 自動詞
1.
to make war (on), to wage war (against), to go to war (with), to fight (with), to do battle (against)
esp. 戦う
「う」で終わる五段動詞, 自動詞
2.
to compete (against)
esp. 戦う
「う」で終わる五段動詞, 自動詞
3.
to struggle (against adversities, etc.), to fight, to contend, to resist
esp. 闘う