If you say that something is a sure thing, you mean that you are certain that it will happen or be successful. This proposal is by no means a sure thing
If someone is sure of getting something, they will definitely get it or they think they will definitely get it. A lot of people think that it's better to pay for their education so that they can be sure of getting quality
If you are sure that something is true, you are certain that it is true. If you are not sure about something, you do not know for certain what the true situation is. He'd never been in a class before and he was not even sure that he should have been teaching The president has never been sure which direction he wanted to go in on this issue It is impossible to be sure about the value of land. = certain doubtful
If you say that something is for sure or that you know it for sure, you mean that it is definitely true. One thing's for sure, Astbury's vocal style hasn't changed much over the years
If you are sure of yourself, you are very confident about your own abilities or opinions. I'd never seen him like this, so sure of himself, so in command
having or feeling no doubt or uncertainty; confident and assured; "felt certain of success"; "was sure (or certain) she had seen it"; "was very sure in his beliefs"; "sure of her friends"
You say sure enough, especially when telling a story, to confirm that something was really true or was actually happening. We found the English treacle pudding too good to resist. Sure enough, it was delicious
emphasis You can use sure in order to emphasize what you are saying. `Has the whole world just gone crazy?' --- `Sure looks that way, doesn't it.' = certainly