This is the 1296th most frequent Japanese word.
活
"活" means "life," "active," or "lively."
The word '活' is part of '活力 (katsuryoku)', which refers to vitality or energy, indicating action and life.
彼はチームに新しい活力をもたらした。
He brought new vitality to the team.
Here, '活' is part of '活発 (kappatsu)', meaning active or energetic, emphasizing dynamic activity.
学生たちは放課後、活発に討論をしていた。
The students were actively debating after school.
In this sentence, '活' is part of '活動 (katsudou)', meaning activity or operation, implying organized efforts involving action.