droigheann

bramble, thorn, Irish droigheann, Old Irish draigen, Welsh draen, Cornish drain, drein, Breton drean, *dragino-: cf. Greek $$Gtrahús, rough, $$Gqrássw, confuse, English dregs. Bezzenberger compares Lithuanian drìgne$$?s, black henbane, Greek $$Gdrábc. Ebel referred it to the same origin as Greek $$Gtérhnos, twig. Also droighneach, (1) thorn, (2) lumber, "entanglement".