To disappear completely without a trace; to vanish without a word or any news.
他去旅游之后，就如同称锤落井一般，再也没有任何音讯了。
After he went on his trip, he vanished like a scale weight falling into a well, and there has been no news from him since.
Next Idiom
To disappear completely without a trace; to vanish without a word or any news.