réasún, résún
Definitions (by source)
reason, ratiocination, 1652, 2258, -60. Hence réasúnta, (1) reasonable, just, 2889. go r., 5658. (2) endowed with reason, 5928.
Desiderius, otherwise called Sgáthán an Chrábhaidh. Editor: Thomas F. O’Rahilly.
m., reason, 8530; gen. –úin, 1606, 2105
Trí Bior-Ghaoithe an Bháis: The Three Shafts of Death. Editor: Osborn Bergin.