beith, beithí
Definitions (by source)
as sb. (with art.), being, ‘ el ser,’ 2362. tréus an mbeith, tréus an ccorp, 7 trés an n-anam maith thug dhuit, ‘ por el ser bueno que teneys,’ 5097. [Cf. ar mbeith 7 ar mbeatha, our existence and our life, Gearnon, 167.]
Desiderius, otherwise called Sgáthán an Chrábhaidh. Editor: Thomas F. O’Rahilly.