Arrogant

google

ref

late Middle English: via Old French from Latin arrogant- ‘claiming for oneself’, from the verb arrogare (see arrogate).

wiktionary

ref

From Middle English arrogaunt, from Old French arrogant, from Latin arrogāns, present active participle of arrogō.

etymonline

ref

arrogant (adj.)

"disposed to give oneself undue importance, aggressively haughty," late 14c., from Old French arrogant (14c.), from Latin arrogantem (nominative arrogans) "assuming, overbearing, insolent," present participle of arrogare "to claim for oneself, assume," from ad "to" (see ad-) + rogare "to ask, entreat, request," apparently a figurative use of a PIE verb meaning literally "to stretch out (the hand)," from root *reg- "move in a straight line." Related: Arrogantly.