プログレッシブ和英中辞典(第4版)の解説
そこう【素行】
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