Accroach
Black's Law Dictionary · Henry Campbell Black, M.A. · 1910
Black's Law Dictionary
To encroach; to exercise power without due authority. To attempt to exercise royal power.
4 Bl. Comm. 76.
A knight who forcibly assaulted and detained one of the king's subjects till he paid him a sum of money was held to have committed treason, on the ground of accroachment.
1 Hale, P. C. 80.