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

To make voiceless

• card
• Card.
• cardamine
• cardamines
• cardamom
• cardamoms
• cardamon
• cardamum
• cardamums
• cardan joint
• cardan joints
• cardboard
• cardboard cities
• cardboard city
• cardboards
• cardboardy
• card-carrying
• cardcase
• cardcases
• card-castle
• card-castles
• card catalogue
• card catalogues
• card column
• card columns