JOYFULLY
gleefully, joyously, joyfully
(adverb) in a joyous and gleeful manner; “the old man had greeted her gleefully”
Source: WordNet® 3.1
Etymology
Adverb
joyfully (comparative more joyfully, superlative most joyfully)
In a joyful manner; joyously.
Source: Wiktionary
JOYFUL
Joy"ful, a.
Definition: Full of joy; having or causing joy; very glad; as, a joyful
heart. "Joyful tidings." Shak.
My soul shall be joyful in my God. Is. lxi. 10.
Sad for their loss, but joyful of our life. Pope.
– Joy"ful*ly, adv.
– Joy"ful*ness, n.
Source: Webster’s Unabridged Dictionary 1913 Edition