jollier
jol-li-er
adjective
More cheerful, merry, or lively; a comparative form of 'jolly'.
"The atmosphere grew jollier as the evening progressed."
Thesaurus
Synonyms: jolly, jolly boat, mirthful, merry, jovial, joyous, jocund, gay, chaff, kid, josh, banter
Antonyms: immoderately, unreasonably