1. conduct
    • 警察官は平素から素行に気をつけなくてはならない
    • Police officers should always 「be careful of [watch] their own conduct.
    • 息子の素行が悪く学校から呼び出された
    • I was called to my son's school because of his behavior problems.
    • 早く素行を改めないと取り返しがつかなくなるよ
    • Mend your ways before it is too late.
    • 彼の素行をチェックした
    • We looked into his doings [private life].
    • 素行の悪い男
    • a man of dubious morality [character]/a degenerate