IPA: /juˈzɜːrp/
KK: /juˈzɜrp/
To take control of something, especially power or rights, from someone else without permission or legal right.
The king was overthrown when a general attempted to usurp his throne.
Past: usurped
Past Participle: usurped
Usurp is formed from "usurpare" (meaning to seize for use) which comes from the combination of "us-" (meaning use) and "-urpare" (meaning to take). The word describes the act of taking or seizing something, especially power or position, without the right to do so.
Think of someone 'taking' ('-urpare') something 'for use' ('us-') that doesn't belong to them — that's why usurp means to seize power or authority unlawfully.