Английский Этимологический словарь - cast (v.)

- 12c., from O.N. kasta "to throw." The noun sense of "a throw" carried an idea of the form the thing takes after it has been thrown, which led to varied meanings, such as "group of actors in a play" (1631). A cast in the eye preserves the older sense of "warp, turn," in which it replaced O.E. weorpan (see warp), and is itself largely superseded now by throw. Castaway first recorded mid-15c.