Avauntour (IPA: əˈvɔːntər) is an archaic term derived from the Middle English word "aventower" which meant a braggart, boaster or swaggerer. The spelling "avauntour" reflects the pronunciation at the time, where the "a" had a short "ə" sound, followed by a stressed "vaw" sound and a schwa "ə" at the end. Today, the term is no longer commonly used, but the spelling serves as a reminder of how the English language has evolved over time.
A boaster.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.