1. to downplay the importance of something
trivialize the events/matter/situation
To 'trivialize' is a verb meaning to make something seem less important, complex or significant than it actually is. Similar in meaning to 'play down' or 'minimize'. "You can't trivialize these findings, this could impact our whole strategy." This is a verb you will hear used more often in professional or formal contexts. Also spelled as 'trivialise'.