Definition of subvocal in English:

subvocal

adjective

Philosophy Psychology
  • Relating to or denoting an unarticulated level of speech comparable to thought.

    ‘almost all of what is called ‘thinking’ is subvocal talk’
    ‘almost all of what is called “thinking” is subvocal talk’
    • ‘The sensor can even detect subvocal or silent speech.’
    • ‘It heightens subvocal speech or forces you to - very quickly - develop nonverbal communication of some subtlety.’

Pronunciation

subvocal

/səbˈvōkəl/