in sing.
a sound or series of sounds made by a horse's hooves on a hard surface
（马蹄敲打路面的）嘚嘚声。
clopped, clopping
no obj., with adverbial of direction(of a horse) move with such a sound（马）发嘚嘚声行进：
the animal clopped on at a steady pace.
那动物嘚嘚稳步前行。
词源
mid 19th cent.: imitative.