The antonyms for the phrase "more preparing" could be anything that signifies less preparation or minimal preparation. Some words that could be used as the antonyms of "more preparing" are unready, ill-prepared, untrained, sloppy, unskilled, unschooled, single-minded, unmethodical, hasty, unplanned, impromptu, unorganized, and so on. These words signify the opposite of "more preparing," which implies taking more time and effort to plan and prepare. In contrast, antonyms depict a lack of preparation, planning, and various forms of disorganization that can lead to substandard results. Therefore, using a thesaurus can aid in determining the appropriate antonyms for "more preparing" in various contexts.