ursa, orsa
Definitions (by source)
ursa, orsa [N. 121] door-post 251; co horsain everywhere 1709, san orsain near at hand 1663.
Duanaire Mhéig Uidhir: The poembook of Cú Chonnacht Mág Uidhir, Lord of Fermanagh 1566-1589. Editor: David Greene. Translator: David Greene.
(121), u. gliadh 288; u. tíre warrior of land 3054; san ursain 2023 n.
The Book of O'Hara: Leabhar Í Eadhra. Editor: Lambert McKenna S.J.
f., jamb, doorpost; prop, stay, 6852; dat. –sain, 1566; i n-orsain an bháis, ‘in the gateway of death,’ 9849
Trí Bior-Ghaoithe an Bháis: The Three Shafts of Death. Editor: Osborn Bergin.