The phrase "most lion hearted" can be broken down into two parts - "most" and "lion hearted". The word "most" implies the highest degree or level of something, while "lion hearted" means courageous or brave. The antonyms (opposites) of "most lion hearted" would, therefore, be words that convey fear, cowardice or timidity. Some examples include "fearful", "cowardly", "timid", "meek", "daunted" and "fainthearted". These words denote a lack of bravery and fortitude, and serve as the antithesis of "most lion hearted", a term that is often used to describe individuals who exhibit extraordinary courage and resilience.