devoice

verb2

1. •
   To pronounce a sound with little or no vibration of the vocal cords, especially a sound that is normally pronounced with such vibration (i.e. a voiced sound).

   • Lastly, as shown in the consonant table above, h- causes any following consonant to be devoiced[.] — 2022
2. •
   (Internet) To remove the voice flag from a user on IRC, preventing them from sending messages to the channel.