smoothly
From LSJ
σὺν μυρίοισι τὰ καλὰ γίγνεται πόνοις → good things come with many pains | no pain, no gain
adv.
P. λείως.
Calmly: P. and V. ἡσυχῆ, ἡσύχως.
Easily: P. and V. ῥᾳδίως, εὐπετῶς; see easily.
Gently: P. and V. ἠπίως, P. πράως, Ar. and P. μαλακῶς, Ar. and V. μαλθακῶς.