Lewis Short
(adjective) : faenārĭus (less correctly fēn-, foen-), a, um, faenum
* Of or for hay, hay-: falces,Cato, R. R. 10, 3; Varr. L. L. 5, 31, 38.—As subst.: faenārĭus, ĭi, m., a seller of hay, a hay salesman, Inscr. ap. Grut. 175, 9.
Charlton T. Lewis, Charles Short, A Latin Dictionary