cheerfullest
/ˈtʃɪr.fəl.ɪst/
adjective
- Most cheerful; having the greatest amount of happiness or optimism.
- The cheerfullest part of the festival was the children's parade.
- She was the cheerfullest person in the room, always smiling and telling jokes.
- Of all the volunteers, he was the cheerfullest, even after hours of hard work.