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.