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

To make voiceless

• prefabricated
• prefabricates
• prefabricating
• prefabrication
• prefabrications
• prefabricator
• prefabricators
• prefabs
• preface
• prefaced
• prefaces
• prefacial
• prefacing
• prefade
• prefaded
• prefades
• prefading
• prefard
• prefatorial
• prefatorially
• prefatorily
• prefatory
• prefect
• prefect apostolic
• prefect of police