Definitions

1. verb

to deprive of a voice or to suppress the use of the voice

“The dictator’s regime devocalised any opposition.”

2. verb (transitive)

to deprive (someone) of the right to speak or to express an opinion

“The government devocalised the protesters by using force.”

3. verb (transitive)

to remove the vocal part of (a sound or instrument)

“The musician devocalised the sound of the trumpet by using a mute.”