Word family noun disciplinarian discipline adjective disciplinary disciplined ≠ undisciplined verb discipline
From Longman Dictionary of Contemporary Englishdisciplinariandis‧ci‧pli‧nar‧i‧an /ˌdɪsəpləˈneəriən $ -ˈner-/ noun [countable] STRICTsomeone who believes people should obey orders and rules, and who makes them do this Dad was a strict disciplinarian.Examples from the Corpus
disciplinarian• Her distance from the moneymaking machine reduced her credibility as a disciplinarian to zero.• The store manager was a disciplinarian, but was always fair to his staff.• Such a deeply mistaken belief can only come from a citizen of a country with a disciplinarian attitude to politics.• His disciplinarian approach was seen to be at odds with West Ham's tradition as a freewheeling and creative team.• He was a real disciplinarian who believed that playing the right notes is the most important thing in music.• Such an organization would have been an easy target for Labour's disciplinarians.• He could be a severe disciplinarian but he was not a rigid man.• She was a wonderful teacher, but a strict disciplinarian.• Nana, in fact, had been the disciplinarian in my family.strict disciplinarian• From what Mama told me, Admiral Makarov was a strict disciplinarian, and Dad hated him.• Mr. Russ was an excellent teacher - a fair man, but whilst a strict disciplinarian, was kindly.• Superintendent Robertson did not care about the mutterings from the lower ranks against her strict disciplinarian attitude. 