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

To make voiceless

• dredging
• dredging-box
• dree
• dreed
• dreeing
• dree one's weird
• drees
• dreg
• decaff
• decaffeinate
• decaffeinated
• decaffeinates
• decaffeinating
• decaffs
• decafs
• decagon
• decagonal
• decagons
• decagram
• decagramme
• decagrammes
• decagrams
• Decagynia
• decagynian
• decagynous