dealg Definitions (by source) Show all Poems on the O'Reillys a thorn. teinn doigh deilg an athálaidh, sore is the pain of a thorn that wounds a spot already wounded, 2846; déanadh dealg dhá dhreich mhálla, let him sharpen his gentle countenance, 2857. Poems on the O'Reillys. Editor: James Carney. Stories from Keating's History of Ireland m., brooch. Stories from Keating's History of Ireland. Author: Geoffrey Keating. Editor: Osborn Bergin.