Authoritarian means demanding obedience and allowing little dissent. An authoritarian regime, an authoritarian father, authoritarian rule.
It is used of governments and of parenting alike. Political scientists separate it from totalitarian: an authoritarian state wants obedience and leaves private life mostly alone, while a totalitarian one wants belief and reaches everywhere.
authoritarian is a quality of rule.
Middle English
auctorite
English
authority
English, today
authoritarian
Built from
From authority + -arian. circa 1880. authority comes from Middle English auctorite. From Middle English auctorite, autorite (“authority, book or quotation that settles an argument”), from Old French auctorité, from Latin - stem of auctōritās (“invention, advice, opinion, influence, command”), from auctor (“master, leader, author”). For the presence of the h, compare the etymology of author.
Etymology from Wiktionary, CC BY-SA