Explanation:

- The word "insult" refers to speaking or acting in a way that shows a lack of respect, often intending harm or humiliation.

- ? Offend: This is the correct synonym. To offend is to cause someone to feel hurt or upset, similar to insulting them.

- Remove: This means to take something away. It's not related to insulting someone.

- Apply: This means to put something to use or request something formally. It's unrelated to insult.

- Offer: This means to present something for acceptance or rejection. It doesn't carry the negative connotation of "insult."