kick-off

n start of a football match （足球比赛的）开球.

ketchup, kettle, kettledrum, key, key (also cay), key money, key signature, key-pad, key-ring, keyboard, keyhole, keynote, keystone, KG, KGB, khaki, kHz, kibbutz, kibbutznik, kick, kick-start, kickback, kicker, kid, kid-glove, kid...into doing, kiddy (also kiddie), kidnap, kidnaper, kidnapper, kidnapping, kidney, kidney bean, kidney machine, kill, kill off, killer, killing, killjoy, kiln,