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

To make voiceless

• non-persistent
• non-person
• non-persons
• non-physical
• non placet
• non-playing
• nonplus
• nonplused
• nonpluses
• nonplusing
• nonplussed
• nonplusses
• nonplussing
• non-poisonous
• nonpolar
• non-prescription
• non-priority
• non-production
• non-productive
• phellogen
• phellogenetic
• phellogens
• phelloid
• phelloplastic
• phelloplastics