noun
certitude
SUR-tih-tood/ˈsɜːrtɪtuːd/
Complete certainty or firm conviction.
The woman points with certitude to the puzzle piece's unmistakably correct fit.

Etymology
Certus described something settled or placed beyond doubt. Certitude names the corresponding state of assurance: confidence that a matter is settled and true.
In context
now certitude or conviction as i understand it is essentially an emotional state you feel sure you are convinced of something you have confirmation of something
More examples
- His youthful certitude fades as he encounters new ideas.
- The discovery unsettles their long-held certitudes.
- He mistakes confidence for certitude.
Forms
certitude · certitudes
Similar words
- certainty
- The more everyday term for absence of doubt.
- conviction
- A firmly held belief that may concern values rather than factual certainty.