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

To make voiceless

• systemises
• systemising
• systemization
• systemizations
• systemize
• systemized
• systemizes
• systemizing
• systemless
• system-maker
• system-makers
• system-monger
• system operator
• systems
• systems analyses
• systems analysis
• systems analyst
• systems analysts
• systems engineering
• systems flowchart
• systems flowcharts
• systems program
• systems programs
• systems software
• systole