fásach
Definitions (by source)
m., wilderness.
Stories from Keating's History of Ireland. Editor: Osborn Bergin.
m., desert; gen. –saigh, 639; pl. dat. fásaighibh, 7456
Trí Bior-Ghaoithe an Bháis: The Three Shafts of Death. Editor: Osborn Bergin.