per-diffĭcĭlis

I. very difficult (class.), Cic. Part. 24, 84: quaestio, id. N. D. 1, 1, 1: navigatio, id. Att. 3, 8, 2.—Sup.: perdifficillimus aditus, Liv. 40, 21.—Adv.: perdiffĭcĭlĭter, with great difficulty, Cic. Ac. 2, 15, 47.