arrogation

the unlawful taking or withholding of something from the rightful owner under a guise of authority <the legislature's arrogation of certain powers that are explicitly reserved by the constitution for the judiciary> Synonyms appropriation, commandeering, detainer, expropriation, preemption, seizure, takeover, usurpationRelated Words annexation, assumption, attachment, confiscation, grab, impoundment, repossession, sequestration; defalcation, embezzlement, misapplication, misappropriation, misuse, peculation, theft; despoilment, looting, pillaging; encroachment, infringement, piracy; invasion, occupancy, occupation, preoccupancy, trespass; deforcement, disfurnishment, dispossession, ejection, stripping