Morpheme
Goof
Type
free base
Denotation
mistake or error, stupid person
Etymology
unknown origin; perhaps from Modern English goff, Middle English goffen, or Old English gaf, ġegaf, ġegaf, gaffetung
Evidence
goof, goofball, goofed, goofer, goofery, goofing, goofish, goofproof, goofs, goofus, goofy