戛然而止 [－－－－]

Jyutping gaat3 jin4 ji4 zi2
Pinyin jiá rán ér zhǐ

Definitions (CC-CEDICT)
  1. with a grunting sound it stops (idiom); to come to an end spontaneously (esp. of sound)
Definitions (Wiktionary)
  1. phrase, especially, idiomatic, of a sound
    to stop abruptly