sure

/ʃʊr/
interjection
  1. Used to express agreement or affirmation.
    • "Is it okay if I borrow your pen?" "Sure, go ahead."
    • "Would you like to join us?" "Sure, why not."
    • "Can you pass the salt?" "Sure!"
adverb
  1. Certainly; without doubt (used for emphasis, often informally).
    • Sure, I can help you with that project.
    • She sure knows how to tell a good story.
    • It sure is hot outside today.
adjective
  1. Confident that something is true or correct; having no doubt.
    • She was sure she had seen the movie before.
    • Are you sure this is the right address?
    • I am sure that I locked the door before leaving.
  2. Certain to happen or be the case; inevitable.
    • With practice, improvement is sure to come.
    • There is no sure way to predict the weather.
    • The team's victory seemed sure after the first goal.
  3. Reliable and dependable; not likely to fail.
    • A sure method for removing stains is to use cold water.
    • He is a sure friend who always keeps his promises.
    • This old ladder is not a sure support for climbing.