Morpheme
Fun
Type
free base
Denotation
diversion, amusement, mirthful sport, jest, joke, cheat, trick
Etymology
probable variant of Middle English fonnen; of unknown origin
Evidence
antifun, fun, funboard, funbox, funfair, funfest, funfilled, funhouse, funless, funlessly, funlessness, funmaker, funned, funner, funness, funnest, funnier, funniest, funning, funnish, funny, funplex, funs, funsies, funster, superfun, unfun