Words for good in Celtic languages.
|Proto-Celtic||*matis = good|
|Old Irish (Goídelc)||maith [maθʲ] = good|
|Irish (Gaeilge)||maith [mˠa(h) / mˠaɪ(h)] = good; goodness, kindness; good things; fertility|
|Scottish Gaelic (Gàidhlig)||math [ma] = good, well|
|Manx (Gaelg)||mie [maɪ] = good, nice, moral, fair, pious, ready, goodness, favourable, virtuous, virtue, goodly|
|Proto-Brythonic||*mad = good|
|Middle Welsh (Kymraec)||mad [maːd] = good|
|Welsh (Cymraeg)||mad [maːd] = good, lucky, fortunate, suitable, auspicious, beneficial, virtuous, holy, fair, pleasant, beautiful|
|Cornish (Kernewek)||mas [ma:z / mæ:z] = good, respectable, moral|
|Middle Breton||mat = good|
|Breton (Brezhoneg)||mat / mad [maːd] = good, good product, moral, well (done), sweet|
From Proto-Indo-European *meh₂tis (ripe, good), from *meh₂- (to ripen, to mature) [source].
Note: mad is not commonly used in modern Welsh. The usual word for good is da.
Words marked with a * are reconstructions.