au fait /ō feˈ/

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

• fains I
• faint
• fainted
• fainter
• faintest
• faint-heart
• faint-hearted
• faint-heartedly
• faint-heartedness
• faint-hearts
• faintier
• faintiest
• fainting
• faintings
• faintish
• faintishness
• faintishnesses
• faintly
• faintness
• faintnesses
• faints
• fainty
• fainéance
• fainéances
• fainéant