If you hate someone or something, you have an extremely strong feeling of dislike for them.

If you say that you hate something such as a particular activity, you mean that you find it very unpleasant.

You can use hate in expressions such as 'I hate to trouble you' or 'I hate to bother you' when you are apologizing to someone for interrupting them or asking them to do something.

You can use hate in expressions such as 'I hate to say it' or 'I hate to tell you' when you want to express regret about what you are about to say, because you think it is unpleasant or should not be the case.

You can use hate in expressions such as 'I hate to see' or 'I hate to think' when you are emphasizing that you find a situation or an idea unpleasant.

You can use hate in expressions such as 'I'd hate to think' when you hope that something is not true or that something will not happen.