tr.v. marred, mar·ring, mars
1. To inflict damage, especially disfiguring damage, on.
2. To impair the soundness, perfection, or integrity of; spoil.
A disfiguring mark; a blemish.
[Middle English merren, from Old English mierran, merran, to impede.]
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.