Most expressing is a term used to describe something that is extremely indicative or revealing. Antonyms for the word "most expressing" would be words that denote minimal or insignificant indication. Examples of antonyms for "most expressing" include ambiguous, vague, indefinite, or obscure. These words suggest that something is not clear, direct, or conclusive, and therefore cannot be used to express much meaning or significance. Other antonyms for "most expressing" might include understated, subtle, muted, or modest, as these words imply a lack of emphasis or exaggeration. Ultimately, the choice of antonym will depend on the context and intended meaning, as well as the speaker's personal preferences for word choice.