Webster's Revised Unabridged Dictionary · 1913

Gash

Gash (gash) , transitive verb

[For older garth or garse, Old French garser to scarify, French gercer to chap, perh. from an assumed Late Latin carptiare, from Latin carpere, carptum, to pluck, separate into parts; compare Late Latin carptare to wound. Compare Carpet.]

To make a gash, or long, deep incision in; -- applied chiefly to incisions in flesh.
Grievously gashed or gored to death. — Hayward

Gash , noun

A deep and long cut; an incision of considerable length and depth, particularly in flesh.