1. Produced by inbreeding.
2. Consisting of or involving a homogenous or unvaried group of people: "[The college's] faculty became markedly less inbred, with the proportion of alumni dropping from 68 to 41 percent" (Jerome Karabel).
3. Fixed in the character or disposition as if inherited; deep-seated: an inbred distrust of radicalism.
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.