v. Obs. [UNDER-1 4 a.] trans. = UNDERDELVE v.
1382. Wyclif, Ezek. xxxvi. 35. Citees desert and destitute and vndirdiggid.
1548. Patten, Exped. Scotl., B vj. Ye Castel, whose walles were so thick that it was not an easy matter sone to vnderdig them.
1580. Hollyband, Treas. Fr. Tong, Sarfouir, to vnderdig or vndermine.
1600. Surflet, Countrie Farme, III. iv. 430. So soon as they growe, they must be clensed from weedes, and vnderdigd.