[Alteration of Middle English garsen, to scarify, from Old North French garser, from Late Latin charaxāre, to scratch, engrave, from Greek kharassein.]
transitive verb: gashed, gash·ing, gash·es.
To make a long deep cut in; slash deeply.
noun
A long deep cut.
A deep flesh wound.
The American Heritage® Dictionary of the English Language, Fourth Edition