Designating those Indo-European languages, including the Italic, Hellenic, Celtic, and Germanic branches, that merged the palatal velar stops with the plain velars k, g, gh and maintained a distinction between them and the labiovelars kw, gw, gwh.
[Latin, hundred (a word whose initial sound in classical Latin illustrates the preservation of the Indo-European palatal velar as a velar k); see dek in the Appendix of Indo-European roots.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 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.