IPA: /ˌoʊvərˈmɑːstər/
KK: /oʊvərˈmɑːstər/
To defeat or control someone or something completely, often by using greater strength or power.
The hero was able to overmaster the villain and save the day.
Past: overmastered
Past Participle: overmastered
Overmaster → It is formed from "over-" (meaning excessively or beyond) and "master" (from Old English "mægester", meaning one who has control or authority). The word "overmaster" means to gain excessive control or authority over someone or something.
Think of having control that is 'beyond' ('over-') what is normal, which helps you remember that 'overmaster' means to dominate or control excessively.