LIGHTHEARTED
blithe, blithesome, lighthearted, lightsome, light-hearted
(adjective) carefree and happy and lighthearted; “was loved for her blithe spirit”; “a merry blithesome nature”; “her lighthearted nature”; “trilling songs with a lightsome heart”
Source: WordNet® 3.1
Etymology
Adjective
lighthearted (comparative more lighthearted, superlative most lighthearted)
Joyful, glad, taking pleasure in being alive; not depressed or sad.
Enjoyably lacking of seriousness, not grave.
Synonyms
• gladsome
• joyous
Source: Wiktionary
Light"-heart"ed, a.
Definition: Free from grief or anxiety; gay; cheerful; merry.
– Light"-heart`ed*ly, adv.
– Light"-heart"ed*ness, n.
Source: Webster’s Unabridged Dictionary 1913 Edition