dìdean

protection, a fort, Irish dídean, Old Irish dítiu, g. díten, *di-jemtion- (Stokes); root jem, cover, protect, Lettic ju'mju, ju'mt, cover a roof. The Old Irish verb is do-emim tueor. Ascoli makes the root em, as in Latin emo, buy. Cf. eiridinn.