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

To make voiceless

• gubernatorial
• gubernators
• gubs
• guck
• guckier
• guckiest
• gucks
• gucky
• guddle
• guddled
• guddles
• guddling
• gude
• gude-
• gude-dame
• gudeman
• gudesire
• gudgeon
• gudgeoned
• gudgeoning
• gudgeon pin
• gudgeon pins
• gudgeons
• gue
• Gueber