Lewis Short
(adjective) : improspectus (inpr-), a, um, 2. in-prospectus
* Not seen from afar, unseen: Aetna, Auct. Carm. Aetn. 339.—Adv.: improspectē, improvidently: Jephte improspecte voverat,Hier. adv. Jovin. 1, 23: satis,Tert. Anim. 24.
Charlton T. Lewis, Charles Short, A Latin Dictionary