verb
usurp
yoo-ZURP/juːˈzɜːrp/
Take power or a position without the right to do so.
The noble usurps the throne while its rightful ruler protests.

Etymology
The roots combine as “seize for use.” That idea developed into taking something without a right to it, especially another person's office, authority, or privileges.
In context
bessus was to usurp the throne and dispose of Darius by assassinating him or imprisoning him
More examples
- The king's brother usurped the throne while he was abroad.
- She accuses her assistant of usurping her role as director.
- The committee cannot usurp powers reserved for elected officials.
Forms
usurp · usurps · usurped · usurping
usurper noun — Someone who takes power without rightful authority.
usurpation noun — The wrongful taking of power or position.
Similar words
- seize
- Emphasizes taking control, often forcibly, without necessarily implying illegitimacy.
- appropriate
- Usually concerns taking property or resources rather than a position.