Ὅμηρον ἐξ Ὁμήρου σαφηνίζειν → explain Homer from Homer, explain Homer with Homer
nĕpūs: ne and Sanscr. root pū, cleanse; cf. purus,I unclean, impure: nepus non purus, Paul. ex Fest. p. 164 Müll.
nĕpūs, a, um, pour non purus : P. Fest. 164.