More unfastidious is a term that reflects an individual's tendency to be less particular or picky about things. To find an antonym for this word, one can consider phrases like "more particular" or "more meticulous." These words denote a heightened sense of attention to detail and a preference for order and precision. Some other contradictory terms can include "more selective," "more demanding," or "more finicky." If an individual is more unfastidious, it means they are less concerned about cleanliness, order, and neatness. By contrast, people who prefer more finicky or demanding conditions are likely to value these things and take a keen interest in cleanliness, order, and neatness.