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

To make voiceless

• sertularian
• sertularians
• seruewe
• serum
• serum albumin
• serum albumins
• serum globulin
• serum globulins
• serum hepatitis
• serums
• serum sickness
• serum therapies
• serum therapy
• serval
• servals
• servant
• servanted
• servant-girl
• servant-girls
• servanting
• servant-lass
• servant-lasses
• servantless
• servant-maid
• servant-maids