tádhbhacht
Definitions (by source)
substance, validity, importance. nach tréith tádhbhachta, not lacking in substantial qualities, 2800. The present form with á is a mixture of tadhbhacht and the later tábhacht.
Poems on the O'Reillys. Editor: James Carney.
f., substance, validity, substantiality, 7069
Trí Bior-Ghaoithe an Bháis: The Three Shafts of Death. Editor: Osborn Bergin.