dòcha

more likely, Irish dócha, Old Irish dochu; comparative of dóigh, Old Irish dóig, likely, *dougi-, *douki-; Greek $$Gdeúkei, thinks, $$Ga$$'deukc/s, unseemly; German zeuge, witness; further allied is Latin dûco. Connection with Greek $$Gdokéw has been suggested, and Zimmer has analysed it into *do-ech, *do-sech, root sec, say (as in caisg, etc.: Cam.), citing the by-form toich (Gaelic toigh), which is a different word. Hence dòchas, dòigh.