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subvocal

American  
[suhb-voh-kuhl] / sʌbˈvoʊ kəl /

adjective

  1. mentally formulated as words, especially without vocalization.

Etymology

Origin of subvocal

First recorded in 1920–25; sub- + vocal

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.