with diligence; in a diligent manner; "we may diligently observe the Lord's supper on the first day of the week, diligently preach the gospel, or minister to the saint"
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 killed sure enough"; "he'll win sure as shooting"; "they sure smell good"; "sure he'll come"