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

To make voiceless

• sulphite
• sulphite pulp
• sulphite pulps
• sulphites
• sulpho-
• sulphonamide
• sulphonamides
• sulphonate
• sulphonated
• sulphonates
• sulphonating
• sulphonation
• sulphonations
• sulphone
• sulphones
• sulphonic
• sulphonic acid
• sulphonium
• sulphoniums
• sulphonyl
• sulphonyls
• sulphonylurea
• sulphonylureas
• sulphur
• sulphurate