Word: 锁 (suǒ)

他把自己锁在房间里，不让人进去！

Tā bǎ zìjǐ suǒ zài fángjiān lǐ, búràng rén jìnqù!

He's locked himself in his room and won't let anyone in!

你没锁好你的车吗？

Nǐ méi suǒ hǎo nǐ de chē ma?

Didn't you lock up your car?

你没锁好门，真不小心呢。

Nǐ méi suǒ hǎo mén, zhēn bù xiǎoxīn ne.

It was careless of you to leave the door unlocked.

她把自己锁在浴室了。

Tā bǎ zìjǐ suǒ zài yùshì le.

She's locked herself in the bathroom.

我发现自己被锁在浴室里。

Wǒ fāxiàn zìjǐ bèi suǒ zài yùshì lǐ.

I found myself locked in the bathroom.

有人把我锁在这房间里。

Yǒurén bǎ wǒ suǒ zài zhè fángjiān lǐ.

Someone locked me in the room.

请务必确认门是锁着的。

Qǐng wùbì quèrèn mén shì suǒzhe de.

Please make sure that the door is locked.