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

To make voiceless

• ordinary seamen
• ordinary shares
• ordinate
• ordinated
• ordinately
• ordinates
• ordinating
• ordination
• ordinations
• ordinee
• ordinees
• ordnance
• ordnance datum
• ordnances
• Ordnance Survey
• ordonnance
• ordonnances
• Ordovician
• ords
• ordure
• ordures
• ordurous
• o're
• ore
• oread