Bother means trouble or difficulty. You can also use bother to refer to an activity which causes this, especially when you would prefer not to do it or get involved with it.

If you say that you can't be bothered to do something, you mean that you are not going to do it because you think it is unnecessary or because you are too lazy.

If you do not bother to do something or if you do not bother with it, you do not do it, consider it, or use it because you think it is unnecessary or because you are too lazy.

If something bothers you, or if you bother about it, it worries, annoys, or upsets you.

If someone bothers you, they talk to you when you want to be left alone or interrupt you when you are busy.