ichidan verb, transitive verb
tighten; stiffen; brace; strain
Used for physically pulling something taut (e.g., a rope, belt, skin) or metaphorically tightening discipline, focus, or posture.
ベルトを引き締めて、ズボンが落ちないようにした。
I tightened my belt so my pants wouldn't fall down.
試合前に気持ちを引き締めて集中した。
Before the match, I braced myself and focused.