devoiced

/D IH0 V OY1 S T/
verb
  1. 1

    To pronounce a word with little movement of the vocal cords

  2. 2

    To remove the voice flag from a user on IRC, preventing them from sending messages to the channel.

Source: https://en.wiktionary.org/wiki/devoice, https://en.wiktionary.org/wiki/devoiced