Definition of devoice in English:

devoice

verb

[WITH OBJECT]Phonetics
  • Make (a vowel or voiced consonant) voiceless.

    ‘the devoicing of the final consonant is compensated for by a lengthening of the preceding vowel or diphthong’
    • ‘Final voiced consonants tend to be devoiced: ‘dok’ for dog, ‘piecess’ for pieces.’
    • ‘Among other things, it's not uncommon to hear a German native speaker devoicing at least some final consonants while speaking English.’
    • ‘The other step in making granted sound exactly the same as granite is to devoice the final /d/.’

Pronunciation:

devoice

/diːˈvɔɪs/