ma·nure (mə-nər, -ny-, nr, -nyr)
1. The dung of livestock or poultry.
2. Such dung, or other organic or chemical material, used to fertilize soil.
tr.v. ma·nured, ma·nur·ing, ma·nures
To fertilize (soil) by applying material such as animal dung.
[From Middle English manuren, to cultivate land, from Anglo-Norman mainouverer, from Vulgar Latin *manūoperāre, to work with the hands : Latin manū, ablative of manus, hand; see man-2 in the Appendix of Indo-European roots + Latin operārī, to work; see op- 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.