lockgate

例句：

1. 1. The prisoner was locked in his cell for the night.
   囚犯被锁在牢房里过夜。
2. 2.The gate is locked and no one can enter without authorization.
   大门已经锁上了，未经授权任何人都不能进入。
3. 3. The old house had a lockgate that could only be opened with a key.
   这所老房子有一个只能用钥匙打开的锁门。