folaightheach
Definitions (by source)
secret, 2156; go f. 959.
An Teagasg Críosdaidhe. Editor: Fearghal Mac Raghnaill, O.F.M.
secret, hidden; generally adv., go f., 906, 2668, 7960
Trí Bior-Ghaoithe an Bháis: The Three Shafts of Death. Editor: Osborn Bergin.