闩

例句：

1. 1. The door is locked from the inside.
   门从里面上了锁。
2. 2. He tried to catch the thief but failed.
   他试图抓住那个小偷，但失败了。
3. 3. The old man used a latch to keep his house safe.
   老人用一个闩来保护他的家。