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

To make voiceless

• cheerleaders
• cheerless
• cheerlessly
• cheerlessness
• cheerlessnesses
• cheerly
• cheers
• cheer to the echo
• cheer up
• cheery
• cheese
• cheeseboard
• cheeseboards
• cheeseburger
• cheeseburgers
• cheesecake
• cheesecakes
• cheesecloth
• cheesecloths
• cheesecutter
• cheesecutters
• cheesed
• cheesed off
• cheese-head
• cheesehopper