manure
manure (mə-nrʹ, -nyrʹ) noun
Material, especially barnyard or stable dung, often with discarded animal bedding, used to fertilize soil.
verb, transitive
manured, manuring, manures
To fertilize (soil) by applying material such as barnyard 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 + Latin operārī, to work.]
manurʹer noun
manuʹrial adjective