certitude

She spoke with certitude about her beliefs.

I can't say with certitude that he will come.

His certitude in the decision was unwavering.

The scientist presented his findings with certitude.

She faced the challenge with certitude and determination.

The team moved forward with certitude that they would succeed.

He expressed his certitude that the plan would work.

Certitude in his abilities helped him overcome obstacles.

The teacher spoke with certitude when explaining the concept.

The CEO's certitude in the company's future inspired the employees.