1. I 〔生命にかかわる所〕a vital part [point]
    • 急所を外れる〔弾丸などが〕
    • miss a vital spot
    • ボールは急所に当たったらしい
    • The ball seems to have hit him where it hurts.
  1. II 〔要所〕the main point
    • 急所を突いた質問
    • a question that touches [goes to] the heart of the matter/a question which touches on a vital [key] point
    • 急所を突かれてたじたじだった
    • I was attacked on a vulnerable spot and wavered.