Translation of "Pit" in Chinese

A fall into a pit, a gain in your wit.

- 吃一塹，長一智。
- 吃一堑长一智。

The demon grabbed my sister and, with howling laughter, cast her into a bottomless pit.

惡魔一把抓住了我的妹妹，一邊猙獰地狂笑着，一邊把她丟進了一個無底洞裏。