n. pl. war·locks
A person, especially a man, claiming or popularly believed to practice sorcery or witchcraft.
[From Scots warlock (generalized in English from literary use by Scottish authors and replacing Early Modern English warlow), from alteration (with -ok for Middle English -ow as in Scots elbok, elbow, and windok, window) of Middle English warloghe, warlow, from Old English wǣrloga, oath-breaker : wǣr, pledge; see wērə-o- in the Appendix of Indo-European roots + -loga, liar (from lēogan, to lie; see leugh- 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.