kazoo

n (pl ~s) toy musical instrument that gives a buzzing sound when sb blows through it while humming 一种玩具笛.

kaffir, kaftan, Kaiser, kale (also kail), kaleidoscope, kaleidoscopic, kaleidoscopically, kamikaze, kangaroo, kangaroo court, Kansas, kaolin, kapok, kaput, karat, karate, karma, kart, Kashmir, kayak, KB, KBE, KC, kebab, kedgeree, keel, keen, keenly, keenness, keep, keep (radio) tuned for, keep (sb/sth) away (from sb/sth), keep a promise, keep an eye on, keep at, keep away, keep back, keep clear of, keep company with, keep doing sth.,