cesair

Welsh

From Proto-Celtic *kassris (“hail-shower”)^[1] or *kass(a)rā,^[2] from Proto-Indo-European *ḱh₂d- (“to fall”). Cognate with Breton kazerc'h, Cornish keser and Old Irish casar (“hail, lightning”).

cesair f (collective, feminine singulative ceseiren)^[3]

Mutated forms of *cesair*
radical	soft	nasal	aspirate
cesair	gesair	nghesair	chesair

Note: Certain mutated forms of some words can never occur in standard Welsh.
All possible mutated forms are displayed for convenience.

^ Vendryes, Joseph (1987) Lexique Étymologique de l'Irlandais Ancien (in French), volume C, Dublin, Paris: Dublin Institute for Advanced Studies, Centre national de la recherche scientifique, page C-46
^ Matasović, Ranko (2009) “*Kassarā”, in Etymological Dictionary of Proto-Celtic (Leiden Indo-European Etymological Dictionary Series; 9), Leiden: Brill, →ISBN
^ R. J. Thomas, G. A. Bevan, P. J. Donovan, A. Hawke et al., editors (1950–present), “cesair”, in Geiriadur Prifysgol Cymru Online (in Welsh), University of Wales Centre for Advanced Welsh & Celtic Studies