しろ

In a sentence

• 命令されたらしろと言われた。

  I was told to do it when ordered.

  Here, 'しろ' is the imperative form of the verb 'する', meaning 'to do'. It is used to convey a direct command.

• このしろい服が好きです。

  I like these white clothes.

  In this sentence, 'しろい' is the adjective form meaning 'white', describing the color of the clothes.

• 知らないことはしろうとしないほうがいい。

  It's better not to try to know things you don't understand.

  Here, 'しろう' is the volitional form of '知る', meaning 'to know'. It expresses the intention to try to know something.