éifeacht
Definitions (by source)
3228 n.
Leabhar Branach: The Book of the O'Byrnes. Editor: Seán Mac Airt.
efficiency, power, etc. ní bhfuil éifeacht d'éinneach do cháineadh, it avails nothing for any person to revile you, 3243.
Poems on the O'Reillys. Editor: James Carney.