Deuce “two at dice or cards” is from Old French deus, now spelled deux, from Latin duos “two.”

Anatoly Liberman on the etymology of “deuce,” “doozy,” and “floozy” on the OUPblog.

Deuce “two at dice or cards” is from Old French deus, now spelled deux, from Latin duos “two.”

Anatoly Liberman on the etymology of “deuce,” “doozy,” and “floozy” on the OUPblog.