The Proto-Indo-European word *nák(es)-
Word *nák(es)-
Meaning hide, pelt
Synonyms *k̂eudh-, *pel-, *(s)kʷéhₓtis, *péln-, *hₐeĝínom

Comments
Mallory J.P. and Adams D. (2006)

Other words that might be of interest
*twéks ‘skin’, *moisós ‘sheep, ram, fleece, skin’, *kérmen- ‘skin’