biseach
Definitions (by source)
[N. 55] increase, improvement; gs. as adj. (fíor)bhisigh 2393.
Duanaire Mhéig Uidhir: The poembook of Cú Chonnacht Mág Uidhir, Lord of Fermanagh 1566-1589. Editor: David Greene. Translator: David Greene.
increase, growth, profit, etc. ar biseach, prospering, flourishing, 1058; Gen. sg. bisigh used adjectivally: go ngairm bhisigh, of flourishing renown, 2707
Poems on the O'Reillys. Editor: James Carney.
m., increase, amendment, b. na sláinte, 1703
Trí Bior-Ghaoithe an Bháis: The Three Shafts of Death. Editor: Osborn Bergin.