Source : Webster's Revised Unabridged Dictionary (1913)

Tenderly \Ten"der*ly\, adv.
   In a tender manner; with tenderness; mildly; gently; softly;
   in a manner not to injure or give pain; with pity or
   affection; kindly. --Chaucer.

Source : WordNet®

tenderly
     adv : with tenderness; in a tender manner; "tenderly she placed
           her arms round him"