Lewis Short
(adjective) : per-longus, a, um
* Very long.
* Lit.: via,Cic. Att. 5, 20, 8: perlongum. adverb., for a very long time, very long, Aus. Epigr. 1, 7.
* Transf., very tedious, Plaut. Trin. 3, 3, 17.—Adv.: perlongē, a very long way off, very far: perlonge est,Ter. Eun. 3, 5, 61.
Charlton T. Lewis, Charles Short, A Latin Dictionary