Words related to dice
"small cube marked on each face with spots numbering from one to six, used in gaming," early 14c. (as a plural, late 14c. as a singular), from Old French de "die, dice," which is of uncertain origin. Common Romanic (cognates: Spanish, Portuguese, Italian dado, Provençal dat, Catalan dau), perhaps from Latin datum "given," past participle of dare "to give" (from PIE root *do- "to give"), which, in addition to "give," had a secondary sense of "to play" (as a chess piece); or else the notion is "what is given" (by chance or Fortune).
The numbers on the opposite sides always add up to seven; otherwise there is no uniformity to their arrangement. Sense of "engraved stamping block or tool used for stamping a softer material" is from 1690s. Perhaps so called because they often were used in pairs (to impress on both sides, as of a coin). Figurative phrase the die is cast "the decisive stem is taken" is from 1630s, in reference to the throw of the dice.
late 15c., dews, "the 2 in dice or cards," also "a roll of 2 in dice" (1510s), from Old French deus (Modern French deux), from Latin duos (nominative duo) "two" (from PIE root *dwo- "two"). The spelling -ce from -s to reflect voiceless pronunciation is as in dice, pence, etc.
The word became a mild oath by 1710, about 50 years after it was first attested in the sense of "bad luck, the devil, etc.," perhaps because two was the lowest score, and probably by similarity to Latin deus and related words meaning "god." According to OED, 16c. Low German had der daus! in the same sense, which perhaps influenced the English form.
In tennis, "a stage of the game in which both players or sides have scored 40, and one must score 2 points to win," 1590s. Deuce coupe is 1940s hot-rodder slang for "souped up two-door car," especially a 1932 Ford. Related: Deuced; deucedly.