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

To make voiceless

• fishplate
• fishplates
• fish pond
• fish ponds
• fish-salesman
• fish-salesmen
• fish-scrap
• fish-scraps
• fishskin
• fish skin disease
• fishskin disease
• fishskins
• fish slice
• fish slices
• fish-spear
• fish-spears
• fish-stew
• fish-stews
• fish stick
• fish sticks
• fish-strainer
• fish-strainers
• fishtail
• fishtailed
• fishtailing