noun

surety

Confidence that something is true.

She speaks with surety because the evidence supports her conclusion.

Etymology

The French noun names security or confidence. This sense of surety preserves certainty that a belief or statement is true.

More examples

  • I cannot say with surety who sent the letter.
  • Repeated tests give us greater surety that the results are accurate.
  • His surety about the answer fades when he checks his work.

Forms

surety

sure adjective — Confident that something is true.

Similar words

certainty
The more usual word for complete absence of doubt.
confidence
Can describe strong belief without implying complete absence of doubt.
conviction
Emphasizes a firmly held belief, especially despite disagreement.