féidir, éidir, -ear
Definitions (by source)
ní (fh)é., it is impossible (to get, to be done, etc.); ní hé. liom acht 51 12; deacair mar iad ní hé. 50 25; long nach f. i dtír 84 3; nach f. mo ré do roinn 10 10; ní f. goin ríogh d’agra 71 23.
Aithdioghluim Dána: A Miscellany of Irish Bardic Poetry, Historical and Religious, including the Historical Poems of the Duanaire in the Yellow Book of Lecan. Vol II, Translations, Notes, Vocabulary. Editor: Lambert McKenna S.J.
See also éidir.