The Proto-Celtic word *u̯o-lawo
Word *u̯o-lawo
Meaning rain
Synonyms *wera

Other words that might be of interest
*akʷā ‘water’, *dubro ‘water’, *stagro ‘river, water’, *krasto- ‘dry’, *siskʷo ‘dry’, *jagi ‘ice’, *korkākā ‘swamp’