knucklehead

n (infml derog 口, 贬) fool 笨蛋; 傻瓜.

knot-hole, knotty, know, know about, know better than, know no bounds, know of, know sb. by name, know-all, know-how, knowing, knowingly, knowledgable, knowledge, knowledgeable, knowledgeably, known, known as, knuckle, knuckleduster, KO, koala, kobo, kohl, kohlrabi, kola, kook, kookaburra, kooky, kopeck (also kopek), koppie (also kopje), Koran, Koranic, Korea, Korean, kosher, koumiss, kowtow, kph, kraal,