v. Obs. [UNDER-1 8 a.] trans. To search into, to investigate; to learn.
a. 1412[?]. Lydg., Two Merch., 351. And whan his freend the sothe gan vndirgrope of this myscheef. Ibid. (141220), Chron. Troy, IV. 4644. But he anon Gan vndergrope, pleinly, what þei ment.
1447. Bokenham, Seyntys (Roxb.), 28. The secunde yer of the forseyd pope, As be cronyculers I vndyrgrope, Fel a ful greuows dissencyoun.
1678. Littleton, Lat. Dict., Subtento, to assay or try underhand, to under-grope.