subvocalization

/S AH0 B V OW1 K AH0 L IH0 Z EY1 SH AH0 N/
noun
  1. 1

    (uncountable) The formation in thought of words or statements, which are expressed inwardly but not uttered aloud.

  2. 2

    (countable) Subvocal words or statements so formed.