Assurance
What it means
Meaning 1
A firm statement intended to give confidence about what is true or will happen.
Reach for it when describing words or evidence that remove another person's reasonable doubt
The written warranty gave buyers assurance that repairs were covered.
Meaning 2
Calm confidence in one's own judgment or ability.
Reach for it when praising steady self-confidence visible in manner or action
She answered the panel's detailed questions with quiet assurance.