死 (sǐ): 死ぬ

His grandfather died last year.

War causes many people to die.

That tree has already died.

I don't want to die; I want to live.

He died as a result of a car accident.

Everyone dies eventually.

This is a dead end; we need to turn around.

His study method is too rigid.

I'm extremely tired and want to sleep immediately.

Don't memorize mechanically; understand the meaning.