ex uno disce omnes (L.). From one judge of all the rest.
Facile princeps (L.). Easily pre-eminent; indisputably the first.
facilis est descensus averni (or averno) (L.). The descent to avernus (or hell) is easy.
fait accompli (Fr.). A thing already done.
faux pas (Fr.). A false step.
festina lente (L.). Hasten slowly.
fiat justitia, ruat cælum (L.). Let justice be done though the heavens should fall.
fiat lux (L.). Let there be light!
fidei defensor (L.). Defender of the faith.