The Proto-Indo-European word *wélsu-
Word *wélsu-
Meaning meadow, pasture
See also Proto-Indo-European: *wel- ‘grass’
Synonyms *hₐeĝros

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

Other words that might be of interest
*kerdhehₐ- ‘herd, series’, *wrētos ‘herd, flock’, *hₐeĝrehₐ- ‘hunt’, *poh₂imén- ‘herdsman’, *wéstor- ‘herdsman’