English
manurer
From manure + -er.
A compound of manure + -er
Vulgar Latin *manuoperare ‘work by hand’
Anglo-Norman meinourer
Middle English maynouren ‘to supervise, toil’
English manure
Today it means
noun A person that deals with manure, especially one engaged in natural fertilizers.
Language periods are conventional ranges, not dates for this word.
Etymograph / manurer