o, n. vn. formation from *ar-bong- breach; destruction, etc.: urbach ceathra worrying cattle (of dogs), Laws iv 122.4 Comm. arbach mbo, O'D. 1615 (H. 5.15, 13b). mór n-ergal mór n-erbach n-úag / mor tor trelmach fri imluad, SR 4673 . urbach Ulad .i. cach baili ba hail cairdi o Ulltaibh, isedh donithea; inn uir do thochailt re naigidh ┐ ba geis daibh dul tairrsi, O'D. 2303 ( Rawl. B 506, fo. 30a4 ). in cet cairde do gneth itir Ulta ┐ Feniu dia mbai urbagh nUladh, O'Curry 805 ( H 3.18, 373a ). do dhenamh clodh a nDurmach / coná beith urbhach innti, Laud 615, 106 (Contribb.). seacht gclaidhmhi ré cruadh-urbhach (: Lughdhach), Leb. Cert. 130.16 . airdairc ṅ-aerbach (cheville), LL 4911 . ? ba sí tiget ind áirbaig, LU 6511 = ba sé tiget a colla, TBC-LL¹ 2652 , cf. airbiuch, árbach.