Underplay (verb)

To present or perform something with less emphasis or intensity than is warranted.

Origin:

From the prefix under- meaning less or not enough and the word play.

Examples:

1. She underplayed the significance of her role in the project.
2. He underplayed the gravity of the situation.
3. The actor underplayed his part in the play.
4. The company underplayed the potential risks associated with the product.
5. The speaker underplayed his achievements in his speech.