cuthach
Definitions (by source)
rage, 5363.
Desiderius, otherwise called Sgáthán an Chrábhaidh. Editor: Thomas F. O’Rahilly.
m., madness, rage, 6669’ ar c., ‘mad,’ 8674; gen. as adj. hence, go cuthaigh, 7785
Trí Bior-Ghaoithe an Bháis: The Three Shafts of Death. Editor: Osborn Bergin.