Masturbate (), v. [f. L. masturbt-, ppl. stem of masturbr, of obscure origin: according to Brugmann for *mastiturbr f. *mazdo- (cf. Gr. pl.) virile member + turba disturbance. An old conjecture regarded the word as f. manu-s hand + stuprre to defile; hence the etymologizing forms MANUSTUPRATION, MASTUPRATE, -ATION, used by some Eng. writers.] intr. and refl. To practise self-abuse.