sure

Definitions

Confident in what one thinks or knows; having no doubt.

Reliable, dependable, or certain to happen or be the case.

Used to express agreement or willingness.

Examples

I am sure that we will arrive on time for the meeting.

Are you sure you locked the front door before we left?

Make sure to double-check your work before submitting the final report.

Synonyms

certain confident convinced positive assured definite unwavering

Antonyms

uncertain doubtful unsure hesitant skeptical dubious indecisive