If you describe someone as a disciplinarian, you mean that they believe in making people obey strict rules of behaviour and in punishing severely anyone who disobeys. 信奉及执行严格纪律者
noun [专属名词]厉行纪律的人;严格的人
He has a reputation for being a strict disciplinarian. 他有严格纪律执行者的名声。
adjective [原级]纪律的;训练的
She's a very strict disciplinarian. 她执行纪律非常严格。
-arian- 表形容词或名词,“…的(人)”disciplinarian adj. / n. 纪律严明的(人)(discipline 纪律)