The phrase "most milk-and-water" refers to something that is lacking in substance, character, or intensity. Its antonyms, on the other hand, would be words that describe things that are strong, impactful, and full of depth. Some antonyms for "most milk-and-water" include the words forceful, dynamic, robust, intense, bold, and energetic. These words evoke a sense of power, strength, and vibrancy, as opposed to the blandness associated with the original phrase. Using antonyms of "most milk-and-water" can add color and depth to writing, verbal communication or any context where language is used.