From BiblePortal Wikipedia

King James Dictionary [1]

Soft'Ly, adv.

1. Without hardness. 2. Not with force or violence gently as, be softly pressed my hand. 3. Not loudly without noise as, speak softly walk softly. In this dark silence softly leave the town. 4. Gently placidly. She softly lays him on a flowery bed. 5. Mildly tenderly. The king must die though pity softly pleads within my soul.

Webster's Dictionary [2]

(adv.) In a soft manner.