Most immured means being confined or trapped in a particular place. The antonyms of the word "most immured" are "free," "liberated," "unrestrained," and "unconfined." These antonyms indicate a state of freedom and openness, contrasted with the idea of being trapped or confined. If someone is free, they are not confined or restrained. On the other hand, liberated implies that someone has been freed from a situation that was holding them back, while unrestrained talks about a state of not being limited by anything, and unconfined suggests being able to move and travel without limits. These antonyms provide a sharp contrast to most immured and suggest the opposite, indicating freedom, liberation, and expansiveness.