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Etymology 1[edit]

From Proto-Celtic *wegrom, possibly from Proto-Indo-European *h₂weg- (increase, enlarge) via a sense ‘outgrowth’.[1] Cognate with Cornish gora and Old Irish fér (grass).


gwair m (plural gweiriau)

  1. grass
    Synonym: glaswellt
  2. hay
Derived terms[edit]

Etymology 2[edit]


gwair m (uncountable)

  1. bend, curve, ring

Usage notes[edit]

This word is only found in compounds (see below).

Derived terms[edit]


Welsh mutation
radical soft nasal aspirate
gwair wair ngwair unchanged
Note: Some of these forms may be hypothetical. Not every
possible mutated form of every word actually occurs.


  1. ^ Matasović, Ranko (2009) Etymological Dictionary of Proto-Celtic (Leiden Indo-European Etymological Dictionary Series; 9), Leiden: Brill, →ISBN, page 409
  • R. J. Thomas, G. A. Bevan, P. J. Donovan, A. Hawke et al., editors (1950–present), “gwair”, in Geiriadur Prifysgol Cymru Online (in Welsh), University of Wales Centre for Advanced Welsh & Celtic Studies