Smilingly

Origin

smiling + -ly

Full definition of smilingly

Adverb

1. In a smiling manner; with a smile.
• Shakespeare, King Lear, act 5 scene 3 http://shakespeare.mit.edu/lear/lear.5.3.htmlBut his flaw'd heart,
  Alack, too weak the conflict to support!
  'Twixt two extremes of passion, joy and grief,
  Burst smilingly.