1734, "small wheel," from French roulette "gambling game played with a revolving wheel," literally "small wheel," from Old French roelete "little wheel" (12c.), formed on model of Late Latin rotella, diminutive of Latin rota "wheel" (see rotary). The game of chance so-called from 1745.
rough-house
roughly
roughneck
roughness
roughshod
roulette
round
round robin
roundabout
roundel
roundelay