Antonyms for the word "trepidity" include courage, bravery, confidence, and fearlessness. These words represent the opposite of the feeling of trepidation, or a state of uneasiness or apprehension. Courage refers to the ability to face danger or difficulty without fear; bravery connotes a bold and heroic courage; confidence is the state of being certain of one's abilities; and fearlessness means lacking fear altogether. These words can be used to describe individuals who exhibit exceptional resolve and resiliency in the face of challenges. They represent the qualities needed to overcome obstacles and achieve success, and they inspire admiration and respect in others.