confragus
From LSJ
confrăgus: a, um, adj. confringo (post-Aug.; poet. for confragosus),
I rough, rugged, uneven: dumeta densis arboribus, Luc. 6, 126; Val. Fl. 3, 581.—Subst.: con-frăga, ōrum, n., a rough place, thicket: silvae, Stat. Th. 4, 494.—Comp., sup., and adv. not in use.