The Proto-Indo-European word *werb(h)-
Word *werb(h)-
Meaning to protect, to oversee
See also Proto-Indo-European: *wer- ‘to perceive, to give attention to, to observe’
Phrygian: ΟΡΟΥΑΝ ‘guardian, warden, father’
Synonyms *peh₂-, *gheiĝh-, *gheuĝh-, *hₐlek-, *ser-

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