sure
/ʃoː/ adjective, adverb, interjection
Forms surer surest sho sho'
- adjective Physically secure and certain, non-failing, reliable. “This investment is a sure thing.”
- adjective Certain in one's knowledge or belief. “Are you sure to succeed, as polls say? —Well, I am at least certain of making it to the podium this time.”
- adjective (followed by a to infinitive) Certain to act or be a specified way. “Be sure to lock the door when you leave.”
- adjective Certain to obtain something. “Many people book early in order to be sure of the best seats.”
- adjective (obsolete) Free from danger; safe; secure.
- adjective (obsolete) Betrothed; engaged to marry.
- adverb (modal) Without doubt, certainly. “Sure he's coming! Why wouldn't he?”
- adverb (archaic) Without fail, surely.
- interjection (in response to a request for help or a favour) Yes; of course. “"Could you tell me where the washrooms are?" "Sure, they're in the corner over there."”
- interjection (in response to other questions) Yes; I guess; you could say that; a weak or noncommittal positive response. “"Do you like cats?" "Sure."”
- interjection You're welcome; polite response to being thanked. “"Thanks for helping me with that electrical fault." "Sure. Any time."”
Synonyms
certain failsafe reliable sicker positive wis of course OK yes trusted indisputable surely certainly for sure for certain sure enough sure as shooting
Antonyms
Etymology
From Middle English sure, seur, sur, from Middle French sur or Old French seür, from Latin sēcūrus (“secure”, literally “carefree”), from sē- (“apart”) + cūra (“care”) (compare Old English orsorg (“carefree”), from or- (“without”) + sorg (“care”)). See cure. Doublet of secure and the now obsolete or dialectal sicker (“certain, safe”).
Displaced native Middle English wis, iwis (“certain, sure”) (from Old English ġewis, ġewiss (“certain, sure”)), as well as Middle English siker (“sure, secure”) (from Old English sicor (“secure, sure”)) with which it was cognate.
Webster’s 1913
- adjective Certainly knowing and believing; confident beyond doubt; implicity trusting; unquestioning; positive.
- adjective Certain to find or retain; as, to be sure of game; to be sure of success; to be sure of life or health.
- adverb In a sure manner; safely; certainly. "Great, sure, shall be thy meed." Spenser.
Etymology [OE. sur, OF. seür, F. sûr, L. securus; se aside, without + cura care. See Secure, and cf. Assure, Insure, Sicker sure.]
Sources: Wiktionary · WordNet 3.0 · Webster’s 1913 — from the Wiktionary entry “sure”, CC BY-SA 4.0. Details