1. Being in agreement or accord: remarks consonant with our own beliefs.
2. Corresponding or alike in sound, as words or syllables.
3. Harmonious in sound or tone.
1. A speech sound produced by a partial or complete obstruction of the air stream by any of various constrictions of the speech organs, such as (p), (f), (r), (w), and (h).
2. A letter or character representing such a speech sound.
[Middle English, from Old French, from Latin cōnsonāns, cōnsonant-, present participle of cōnsonāre, to agree : com-, com- + sonāre, to sound; see swen- in the Appendix of Indo-European roots.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2020 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.