The Collaborative International Dictionary of English v.0.48:

Gash \Gash\ (g[a^]sh), v. t. [imp. & p. p. Gashed (g[a^]sht);
   p. pr. & vb. n. Gashing.] [For older garth or garse, OF.
   garser to scarify, F. gercer to chap, perh. from an assumed
   LL. carptiare, fr. L. carpere, carptum, to pluck, separate
   into parts; cf. LL. carptare to wound. Cf. Carpet.]
   To make a gash, or long, deep incision in; -- applied chiefly
   to incisions in flesh.
   [1913 Webster]

         Grievously gashed or gored to death.     --Hayward.
   [1913 Webster]