cheerful
cheer-ful
adjective
Feeling or showing happiness; bright and pleasant in appearance or atmosphere.
"She always has a cheerful disposition."
Thesaurus
Synonyms: upbeat, pollyannaish, optimistic, blithesome, beaming, twinkly, smiling, buoyant, light-hearted, chirpy, lightsome, jaunty
Antonyms: cheerless, depressing, uncheerful