δυσπαλής
From LSJ
νᾶφε καὶ μέμνασο ἀπιστεῖν → keep a clear head and remember not to believe a thing (Epicharmus fr. 250)
English (LSJ)
ές,
A hard to wrestle with, δίνα Id.Eu.559 (lyr.); difficult, c. inf., διακρίνειν . . δυσπαλές [ἐστι] Pi.O.8.25, cf.P.4.273, Cerc.Fr.Oxy.26. 2 dangerous, noxious, ῥίζαι A.R.4.52. 3 stubborn, Nicom.Harm. 3.