from The Century Dictionary and Cyclopedia
- n. A very difficult or insoluble problem. Also called aporime.
Sorry, no etymologies found.
The tradition preserved by Plutarch (_Mar. 9_) that Marius enrolled slaves as well ([Greek: _polyn ton aporon kai doulon katagraphon_]), is apparently an echo from the time of the civil wars.
 Strabo l.c. [Greek: _eis de taen mesogaian anion haethroise dia tacheon plaethos aporon te anthropon kai doulon ep 'eleutheria katakeklaemenon, ous Haeliopolitas ekalese_].
Grant, “Xen.” p. 167. 211 aporon, “which would be awkward” (see Arrian, xxv.