From 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]
From The Collaborative International Dictionary of English v.0.48:
Gash \Gash\, n.
A deep and long cut; an incision of considerable length and
depth, particularly in flesh.
[1913 Webster]