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Irish leath
Proto-Celtic *letos (inherited)
Proto-Celtic *ɸletos (inherited)
Welsh lled (cognate)
Cornish les (cognate)
Latin latus (mention)
Old Irish leth (inherited)
Middle Breton let (cognate)
Middle Breton led (mention)

Irish le (mention)
Irish leathuair (prefix)
Irish leath- (mention)
Irish leathré (prefix)
Irish leithscéal (prefix)
Irish leathsheoltóir (prefix)
Irish leatosach (prefix)
Irish leathóg (affix)
Irish idirleath (affix)
Irish leathbhliantúil (prefix)
Irish leathchéad (prefix)
Irish broncaileathóir (affix)
Scottish Gaelic le (cognate)