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

To make voiceless

• drop-letter
• drop-letters
• drop lock
• droplock loan
• drop locks
• drop-net
• drop-nets
• drop off
• drop-off
• drop on
• drop one's aitches
• drop one's aspirates
• drop one's bundle
• drop out
• dropout
• dropouts
• dropped
• dropped arch
• dropped scone
• dropper
• droppers
• dropping
• dropping fire
• droppings
• dropping-well