usurpative
/ˌʌsərˈpætɪv/ or /ˌʌsərˈpeɪtɪv/Definitions
1. adjective
Tending to seize or take control of power or authority, especially in a way that is considered unjust or wrongful.
“The usurpative tendencies of the dictator led to widespread unrest in the country.”
2. noun
A person or thing that seizes or takes control of power or authority, especially in a way that is considered unjust or wrongful.
“The usurpative leader’s regime was marked by corruption and oppression.”