The antonyms for the term "more prismatic" can be "less colorful," "monotone," "dull," "unvaried," "uninteresting," and "unvarying." These words convey the opposite meaning of "more prismatic," which means an object or entity that is multicolored, vibrant, and multifaceted. While a prismatic object reflects light in a spectrum of colors, its antonyms connote a lack of diversity or variety, with a single color dominating the object. Antonyms of "more prismatic" can be used when describing things that lack the luster, brilliance, or vibrancy usually associated with prismatic objects or phenomena, such as rainbows, crystals, or disco balls.