From Breton-French FreeDict Dictionary (Geriadur Tomaz) ver. 0.8.3: -at suff. -ais (origine) adj.
-at suff. -ais (origine) adj.
From Breton-French FreeDict Dictionary (Geriadur Tomaz) ver. 0.8.3: (!) -at suff. (exclam.-adj./adv.)
(!) -at suff. (exclam.-adj./adv.)