νᾶφε καὶ μέμνασο ἀπιστεῖν → keep a clear head and remember not to believe a thing (Epicharmus fr. 250)
adv.
Hardly: Ar. and P. σκληρῶς. Securely, firmly: P. and V. βεβαίως, ἀσφαλῶς. Obstinately: Ar. and P. ἀυθάδως, P. σκληρῶς.