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

To make voiceless

• immune responses
• immunes
• immune system
• immune systems
• immunifacient
• immunisation
• immunisations
• immunise
• immunised
• immuniser
• immunisers
• immunises
• immunising
• immunities
• immunity
• immunization
• immunizations
• immunize
• immunized
• immunizer
• immunizers
• immunizes
• immunizing
• immuno-
• immunoassaies