devocalize or devocalise /dē-vōˈkə-līz/ or devoice /dē-voisˈ/

To make voiceless

• peace-mongers
• peacenik
• peaceniks
• peace offering
• peace offerings
• peace officer
• peace officers
• peace of God
• peace-parted
• peace-parties
• peace-party
• peace pill
• peace pipe
• peace pipes
• peace process
• peace processes
• peaces
• peace sign
• peace signs
• peacetime
• peacetimes
• peace-warrant
• peace-warrants
• peach
• peach-bloom