to be good at; to excel in; to be an expert in a specific skill or field

To do something on one's own initiative without having the permission or authority to do so; without permission; unauthorized

(bound form) not good at; not skilled in; not an expert in; often used before a noun or verb to indicate a lack of proficiency

to leave one's post without permission; to abscond from one's duties

To monopolize or arrogate power; to take political authority without permission

to act on one's own initiative or make decisions independently without proper authorization

to make decisions on one's own without authorization or consulting others; to act entirely according to one's own will

to make a decision on one's own authority without permission or consultation

To punish or reward according to one's own whims; to assume absolute power and bully others for personal gain.

To be unrivaled in a particular field or area; to possess unique skills that allow one to dominate a specialty.

to be unusually favored by a husband; to enjoy the exclusive attention of a husband (used for a concubine)

to act independently without authorization; to take matters into one's own hands

to be adept in or skilled at something

to make decisions or act without authorization or consultation; to take matters into one's own hands

to act at one's own convenience or authority without seeking permission; to take matters into one's own hands

to enter a place without permission; to trespass

To take control of the military without authorization; to hold onto military power for oneself.

To change, alter, or modify something on one's own initiative without permission from others

To monopolize or assume total power over the affairs of the state; to take the reins of government.

(literary) to dominate the scene or excel beyond all others in a particular field; to be the center of attention due to superior skill

(literary variant) to pass on the throne to a more worthy person rather than an heir

to change, revise, or alter something arbitrarily or without permission

To use something without authorization or permission

to enjoy fame without sharing it; to take all the credit for something

(variant form) to pass on the throne to a more worthy successor

to be skilled in; to excel at; to be an expert in a certain activity or field

to enter a place without permission; to charge into a restricted area