An example of avaunt is what a king would say to a servant to dismiss him from the room.
Origin of avauntMiddle English ; from Old French avant, forward ; from Late Latin abante ; from Classical Latin ab, from + ante, before
Origin of avauntMiddle English, forward, from Old French avant, from Latin abante : ab-, from; see ab–1 + ante, before; see ante–.
(third-person singular simple present avaunts, present participle avaunting, simple past and past participle avaunted)
1275–1325; Middle English, from Old French avant (“to the front”).