The antonyms for the word "most chicken-hearted" would be "bold," "brave," "courageous," "daring," and "gutsy." These words describe someone who is fearless, confident, and willing to take risks. Antonyms for chicken-hearted may also include terms like "adventurous," "adventurous," and "fearless," all of which connote strength and courage. By contrast, chicken-heartedness implies a lack of resolve, determination, or bravery. People who embody the antonyms of chicken-heartedness are those who tackle life's challenges head-on, and do not turn away from difficult or intimidating situations. They are also known for their resilience, resourcefulness, and determination, even in the face of adversity.