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

To make voiceless

• pericardium
• pericardiums
• pericarp
• pericarpial
• pericarps
• pericentral
• pericentric
• perichaetia
• perichaetial
• perichaetium
• perichondria
• perichondrial
• perichondrium
• perichondriums
• perichoreses
• perichoresis
• perichylous
• periclase
• periclases
• Periclean
• periclinal
• pericline
• periclines
• periclitate
• periclitated