僭 - boastfully usurp

usurper; tyrant

presumptuous; arrogant; audacious; forward; insolent

pretension; assumption (of a title)

tyranny

overstepping one's powers (competence, authority); abuse of one's legal authority; acting ultra vires

to usurp boastfully

usurper king

usurpation of a throne

exceeding one's authority to use something

audacity; forwardness; effrontery; impertinence

by your leave; with your permission

to usurp boastfully