BR 1055:1(1) :פכרון ניביה‏ : break (the bear's) teeth
See the entire entry for nīḇ, nīḇā n.m. large tooth, fang

BR 1055:1(1) :פכרון ניביה‏ : break its (i.e. the bear's) fangs
See the entire entry for pkr vb. D to demolish