Adjective: mirthful murth-ful
- Full of or showing high-spirited merriment
"a mirthful laugh";
- gay, jocund [formal], jolly, jovial, merry
- Arousing or provoking laughter
"a mirthful experience";
- amusing, comic, comical, funny, laughable, risible, rib-tickling [informal]
See also: humorous, humourous [Brit, Cdn, non-standard], joyous