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

To make voiceless

• not to worry
• Notts.
• not turn a hair
• notum
• notungulate
• notungulates
• not unnaturally
• not up
• photogenic
• photogenies
• photogens
• photogeny
• photogeologies
• photogeology
• photoglyph
• photoglyphic
• photoglyphies
• photoglyphs
• photoglyphy
• photogram
• photogrammetric
• photogrammetrist
• photogrammetrists
• photogrammetry
• photograms