subvocal

About 0.03 uses per million words.

Meaning

1. adjective Of or pertaining words or statements formed in thought and expressed inwardly but not, or not yet, uttered aloud.
2. adjective Of or pertaining to imperfectly articulated speech that is inaudible or barely audible; subtonic.

Similar words

subvocalized subverbal subauditory intraverbal inward internal interverbal subglottal sub-liminal subtextual

Often followed by

speech rehearsal articulation talking activity repetition reading verbal stimuli

Word family

subvocally