de-emphasise

/D IY1 EH0 M F AH0 S AH0 S/
verb
  1. 1

    To remove or reduce the emphasis from something; to make something less important; to play down.

Source: https://en.wiktionary.org/wiki/de-emphasise, https://en.wiktionary.org/wiki/de-emphasize, https://en.wiktionary.org/wiki/deemphasise