The definition of arrogate is to seize something without justification.
To seize is to take something eagerly, aggressively or by force.
To capture physically; seize:
To take or appropriate (another's property, ideas, etc.) without permission, dishonestly, or unlawfully, esp. in a secret or surreptitious manner
To acquire or take for oneself before others; appropriate:
(Informal) To take forcibly
To take improperly, as without permission
(Law) To effectuate a surrender of.
To take an interest to the extent of:
Find another word for usurping. In this page you can discover 11 synonyms, antonyms, idiomatic expressions, and related words for usurping, like: arrogating, seizing, assuming, taking, stealing, preempting, commandeering, appropriating, surrendering, relinquishing and giving.