prone (～しがちである): He is prone to making mistakes when he’s tired. (彼は疲れると間違いを犯しがちです) - 試験に出る! 英単語検索辞書

prone (～しがちである): He is prone to making mistakes when he’s tired. (彼は疲れると間違いを犯しがちです)

He is prone to making mistakes when he’s tired.