vn. of 1 dorchaid act of darkening, obscuring : fúaras nech roaisneis dam . . . cen d.¤ sudigud na fert, Metr. Dinds. iii 228 . atát ferta na tri mban | im mnái Dáire cen d.¤ `well-remembered', ib. on dorcudh drochsmuinti . . . ata air, Lib. Flav. i 33rb24 . Donnchad gan dorchadh ndatha | mac Domnaill of undimmed hue, Lec. 621b50 = gan doirchi ndatha, BB 50b15 . argg foúair d.¤ ndatha | in Ard molthach mor-Macha died, LL 133a16 = rí rusfuair dorc[h]adh datha, Lec. 53b44 . Cf. ZCP ix 466.13 cited s.v. dorchaigid.