反锁

fǎn suǒ zài fáng jiān li

反锁在房间里

lock in a room

tā qù kāi mén jié guǒ bǎ zì jǐ fǎn suǒ zài le wài miàn

她去开门，结果把自己反锁在了外面。

When she opened it, she locked herself out.