努める
つとめる · tsutomeru · JLPT N2 · verb-ichidan
to try
🎯 努 contains 力 (power): 努める = put your power toward an aim, to try
努力 (doryoku, effort) shares this root: 努 + 力 = effort + power. 努める is the verb form, meaning to direct your strength toward a goal.