Obs. [Seems to repr. an ON. *ar-dagi ‘ploughing-day,’ plowing, f. erja to plow (cf. bardagi ‘battle day,’ battle, f. berja; cogn. w. MHG. artac, ertac (also used as a measure of land). For the abst. sense, cf. also MHG. irretac error, etc.] Plowing, the quantity of land that may be plowed in a day (or other space of time).
c. 1400. Destr. Troy, I. 175. Ayre vp þe erþe on ardagh wise.
1483. Cath. Angl., A Days ardawe (v.r. Dayserth), juger.
