Gnashing
Easton’s Bible Dictionary & Webster’s 1828 Dictionary · Matthew George Easton, Noah Webster
Gnashing - (Webster's 1828 Dictionary)
GNASH'ING, ppr. nash'ing. Striking the teeth together, as in anger, rage or pain.
GNASH'ING, n. nash'ing. A grinding or striking of the teeth in rage or anguish.
There shall be weeping and gnashing of teeth. Mat 8.
Source of the article
Matthew George Easton, Easton’s Bible Dictionary; Noah Webster, American Dictionary of the English Language (1828)
Bible Strong combined digital edition