The Collaborative International Dictionary of English v.0.48:
Lacerate \Lac"er*ate\, v. t. [imp. & p. p. Lacerated; p. pr. & vb. n. Lacerating.] [L. laceratus, p. p. of lacerare to lacerate, fr. lacer mangled, lacerated; cf. Gr. ? a rent, rending, ? to tear; perh. akin to E. slay.] To tear; to rend; to separate by tearing; to mangle; as, to lacerate the flesh. Hence: To afflict; to torture; as, to lacerate the heart. [1913 Webster] Lacerate