The kanji 闘 primarily conveys the meaning of "fight," "battle," "struggle," or "contest." It implies a physical or metaphorical clash, a competition, or a determined effort to overcome an obstacle. It suggests a situation where there is opposition and active engagement.

・On-yomi (音読み): ・トウ (tou) ・Kun-yomi (訓読み): ・たたか（う） (tataka(u)) – to fight, to battle

⚫︎戦闘 Translation: Battle; combat; fight ⚫︎闘争心 Translation: Fighting spirit; competitive spirit ⚫︎格闘技 Translation: Martial arts; combat sports

The kanji 闘 is a phono-semantic compound (形声文字, けいせいいもじ). The semantic component is 門 (mon), meaning "gate," and originally depicted two doors of a gate. The phonetic component is 豆 (tou), representing the sound. Together, they suggest a situation of conflict or struggle occurring between two or more opposing forces, with the gates (doors) acting as a kind of arena or boundary where this takes place. This reflects the character’s core meaning of "fight" or "battle."