foisdine
Definitions (by source)
f. steadfastness 306.
Duanaire Mhéig Uidhir: The poembook of Cú Chonnacht Mág Uidhir, Lord of Fermanagh 1566-1589. Editor: David Greene. Translator: David Greene.
steadiness, 335 ; obstinancy (?), 316.
Leabhar Branach: The Book of the O'Byrnes. Editor: Seán Mac Airt.