1. [adv]  with low volume; "speak softly but carry a big stick"; "she spoke quietly to the child"; "the radio was playing softly"
2. [adv]  with little weight or force; "she kissed him lightly on the forehead"
3. [adv]  used as a direction in music; to be played relatively softly
4. [adv]  in a manner that is pleasing to the senses; "she smiled softly"

SOFTLY is a 6 letter word that starts with S.