The word "most all powerful" describes someone or something that has the highest degree of strength, authority, and control. However, there are several antonyms that can be used to describe the opposite of this powerful state. Some of these antonyms include weak, powerless, feeble, helpless, and impotent. These words suggest a lack of ability, influence, and control over one's surroundings. While "most all powerful" evokes feelings of awe and admiration, its antonyms paint a picture of vulnerability and dependency. It's important to use the appropriate antonym to convey the right message and tone in a given context.