au fait /ō feˈ/

1. Well-acquainted with a matter
2. Well-informed, expert (with with)

• bivalencies
• bivalency
• bivalent
• bivalve
• bivalves
• bivalvular
• bivariant
• bivariate
• bivia
• bivious
• bivium
• bivouac
• bivouacked
• bivouacking
• bivouacs
• bivvies
• bivvy
• bi-weeklies
• bi-weekly
• Bixa
• Bixaceae
• bi-yearly
• biz
• bizarre
• bizarrely