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

To make voiceless

• grizzlier
• grizzlies
• grizzliest
• grizzling
• grizzly
• grizzly bear
• Gro.
• groan
• groaned
• groaner
• groaners
• groanful
• groaning
• groaning board
• groaning boards
• groaningly
• groanings
• groans
• groat
• groats
• groatsworth
• groatsworths
• Grobian
• Grobianism
• grocer