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

To make voiceless

• structuring
• strudel
• strudels
• struggle
• struggled
• struggler
• strugglers
• struggles
• struggling
• strugglingly
• strugglings
• Struldbrug
• strum
• struma
• strumae
• strumatic
• strumitis
• strumitises
• strummed
• strummel
• strummels
• strummer
• strummers
• strumming
• strumose