How to sign: 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";
Similiar / Same: certain
How to sign: definitely or positively (`sure' is sometimes used informally for `surely')
"the results are surely encouraging"; "she certainly is a hard worker"; "it's going to be a good day for sure"; "they are coming, for certain"; "they thought he had been kille;
Similiar / Same: surely, certainly, for sure, for certain, sure as shooting, sure enough