"Most pent" refers to a state of extreme restraint or suppression, and the antonyms for this word would be expressions of freedom, energy, and enthusiasm. Words like "unbridled," "effervescent," "boisterous," and "unrestrained" can be used to describe a state of being that is the opposite of most pent. These antonyms are important to consider in understanding contrasts in human behavior and emotion, and how individuals may display a range of emotions from subdued to exuberant. The use of antonyms is an effective tool in writing, allowing writers to develop their writing skills and use words effectively to convey a variety of emotions.