Fetching details from the dictionary...
arbitrariness; despotism; high-handedness; tyranny
権力者の専横が国を衰退させた。
The despot's tyranny caused the nation to decline.
専横な振る舞いに家臣たちが反発した。
The retainers rebelled against the tyrannical behavior.
専横を極めた支配者に終わりが来た。
The end came for the ruler who reached the height of tyranny.