Lewis Short
(adjective) : impexus (inp-), a, um, 2. inpexus
* Uncombed (poet. and in post-Aug. prose).
* Lit.: stiriaque impexis induruit horrida barbis,Verg. G. 3, 366: caput impexa foedum porrigine,Hor. S. 2, 3, 126: Tisiphoneque impexa feros pro crinibus angues,Tib. 1, 3, 69: tegumen immane leonis Terribili impexum seta,Verg. A. 7, 666.— *
* Trop., = incultus, unpolished, rude: antiquitas tristis et impexa,Tac. Or. 20.
Charlton T. Lewis, Charles Short, A Latin Dictionary