c.1386, "seize prey, take by force," from Anglo-Fr.
raper, O.Fr.
raper "to seize, abduct," a legal term, from L.
rapere "seize, carry off by force, abduct" (see
rapid). L.
rapere was used for "sexual violation," but only very rarely; the usual L. word being
stuprum, lit. "disgrace." Sense of "sexual violation or ravishing of a woman" first recorded in Eng. as a noun, 1481 (the noun sense of "taking anything -- including a woman -- away by force" is from c.1400). The verb in this sense is from 1577.
Rapist is from 1883.