clack
/klæk; klæk/ n
short sharp sound (as) of hard objects being struck together （硬物相碰的）短促而尖锐的声响
the clack of high heels on a stone floor 高跟鞋在石地上的嗒嗒声
the clack of knitting needles, a typewriter 织针、 打字机的啪嗒声. clack, v [I, Tn]
(cause sth to) make this sound （使某物）作喀哒声
(fig 比喻) Pay no attention to clacking tongues, ie to people gossiping. 不理会叽叽喳喳的饶舌.