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

To make voiceless

• stockhorse
• stockhorses
• stockier
• stockiest
• stockily
• stockiness
• stockinesses
• stockinet
• stockinets
• stockinette
• stockinettes
• stockinette stitch
• stockinette stitches
• stocking
• stocking cap
• stocking caps
• stockinged
• stockinger
• stockingers
• stocking-feet
• stocking filler
• stocking fillers
• stocking-foot
• stocking frame
• stocking frames