Definitions from Wiktionary (sure)

▸ adjective:  Physically secure and certain, non-failing, reliable.
▸ adjective:  Certain in one's knowledge or belief.
▸ adjective:  (followed by a to infinitive) Certain to act or be a specified way.
▸ adjective:  (obsolete) Free from danger; safe; secure.
▸ adjective:  (obsolete) Betrothed; engaged to marry.
▸ adverb:  (modal adverb) Without doubt, certainly.
▸ adverb:  (archaic) Without fail, surely.
▸ Also see sure

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