certitude
US /ˈsɝː.t̬ə.tuːd/
UK /ˈsɝː.t̬ə.tuːd/

1.
certeza, convicção
absolute certainty or conviction that something is the case
:
•
He spoke with certitude about his beliefs.
Ele falou com certeza sobre suas crenças.
•
There was a sense of certitude in her voice.
Havia um senso de certeza em sua voz.