sure
sure
adverb
Used informally to mean 'yes' or 'certainly'; expressing agreement.
"'Can you help me?' 'Sure.'."
adjective
Feeling no doubt or being completely confident about something.
"Are you sure about the time?"
adjective
Definitely going to happen or be true; reliable and without failure.
"Success is sure if we work hard."
Thesaurus
Synonyms: secure, positive, certain, confident, convinced, reliable, dependable, trusted, trusty, trustworthy, steady, true