Tooth

One of the particulars regarding which retaliatory punishment was to be inflicted (Ex 21:24; Lev 24:20; Deut 19:21). “Gnashing of teeth” =rage, despair (Matt 8:12; Acts 7:54); “cleanness of teeth” =famine (Amos 4:6); “children’s teeth set on edge” =children suffering for the sins of their fathers (Ezek 18:2).

From Easton’s Bible Dictionary (1897), by Matthew George Easton.