The word "authoritarian" refers to a type of government or leader who has complete control and power over the people, restricts personal freedoms, and imposes strict rules and obedience. Full definition
Although experts were moving away from strict and harsh parenting styles, they are considered today as part of authoritarian parenting styles. (motherhoodinpointoffact.com)
Researchers have posed several different explanations, which you can read about in this article that contrasts the effects of authoritarian parenting with the effects of authoritative parenting. (parentingscience.com)
Power, in short, is addictive and even more so in authoritarian regimes, where there are few institutional mechanisms to prevent abuses. (blog.politics.ox.ac.uk)