an anvil, Irish inneóin, Early Irish indeóin, Old Irish indéin, Welsh einionengion?, Cornish ennian, Breton anneffn: *ande-bnis, "on-hit", from inn- and benô, hit as in bean, q.v. Osthoff gives the stem *endivani-, "on-hit", Zend vaniti, hit.
Etymological dictionary of the Gaelic language.
Alexander Gairm Publications.
1982.