The Proto-Indo-European word *hₐéngʷhis
Word *hₐéngʷhis
Meaning snake
Synonyms *neh₁tr-, *h₁ógʷhis, *néh₁tr-~nh₁tr-

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

Other words that might be of interest
*ank-2, ang- ‘to bend, bow, curve, snake coil, anchor’