KO

abbr 缩写 = (infml 口) knock-out (esp in boxing) 击倒（尤为拳击用语）: He was KO'd (ie knocked out) in the second round. 他在第二回合中被击倒.

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, knucklehead, koala, kobo, kohl, kohlrabi, kola, kook, kookaburra, kooky, kopeck (also kopek), koppie (also kopje), Koran, Koranic, Korea, Korean, kosher, koumiss, kowtow, kph, kraal, kremlin,