"softened tobacco pressed into flat cakes" for chewing or smoking, 1837, presumably from the surname Cavendish, perhaps the name of a Virginia planter. The name is from the place in Suffolk, literally "Cafa's enclosed pasture," from proper name Cafa or Cafna.
caveat
caveat emptor
cave-bear
cave-dweller
caveman
cavendish
cavern
cavernous
caviar
cavil
cavitate