devoicing

verb (used with object), de·voiced, de·voic·ing.

1. to pronounce (an ordinarily voiced speech sound) without vibration of the vocal cords; make voiceless.

verb (used without object), de·voiced, de·voic·ing.

2. to devoice a speech sound.

verb

1. (tr) phonetics to make (a voiced speech sound) voiceless