arroger

Almost exclusively used reflexively, s'arroger means to claim or arrogate a right, power, or title for oneself without any legitimate authority to do so — s'arroger le droit de, s'arroger des pouvoirs. Common in journalism and formal/legal writing about overreach.

• Le maire s'est arrogé des pouvoirs qu'il n'avait pas. — The mayor arrogated powers he didn't actually have.
• Elle s'arroge le droit de décider seule. — She claims the right to decide alone, without any real authority to do so.
• Cette entreprise s'arroge un monopole de fait. — This company is arrogating a de facto monopoly to itself.

This verb only exists in its reflexive form, s'arroger — there is no plain transitive arroger quelqu'un, and the past participle famously does NOT agree with a following direct object the way most reflexive verbs do (elle s'est arrogé des droits, not arrogée), because the direct object comes after the verb.