Lewis Short
(adjective) : imprōmiscŭs (inpr-), a, um, 2 in-promiscus
* Unmixed, unmingled (postclass.): suavitas,Gell. 12, 4, 3: verbum neque numeris neque generibus praeserviens, sed liberum undique et impromiscum,id. 1, 7, 6.
Charlton T. Lewis, Charles Short, A Latin Dictionary