avaunce means to advance; to profit. Lexicurio rates it Sui generis — a strength score of 87 out of 100.
avaunce is pronounced /əˈvɔːns/.
verb
- To advance; to profit.“And so besechyng you, to take on you the defense of this booke, to auaunce the good that may come of it by your allowance and furtherance to publike vse and benefite...”