certain

Definitions

Known for sure; established as true or factual.

Having no doubt; feeling confident or convinced.

Specific but unnamed or not explicitly identified.

Examples

I am certain that we left the keys on the kitchen counter.

There is a certain charm to the way the old house creaks in the wind.

She felt a certain amount of relief once the project was finally completed.

Synonyms

sure confident definite positive convinced assured unquestionable

Antonyms

uncertain doubtful unsure hesitant ambiguous indefinite dubious