Trivialized means to belittle or make something seem less important than it actually is. There are several synonyms for this word, including downplayed, underrated, minimized, dismissed, and undermined. Downplayed often refers to making something seem less dramatic or significant than it is, while underrated suggests that something is undervalued or overlooked. To minimize something is to reduce its importance or significance, while dismissing something is to reject or disregard it. Finally, to undermine something is to weaken or damage its credibility or importance. All of these synonyms convey the idea of making something seem less important or significant than it actually is.