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