Under-gán

According to the Old English Dictionary:

under-gán

to undermine, ruin :-- Gif hwylcne man deóful tó ðam swýþe undergán hæbbe si diabolus hominem aliquem adeo perdiderit, L. Ecg. P. ideceive) here fader, Gen. and Ex. 1147.] under-gan

Related words: 14; Th. ii. 208, 12. Ne sý nán eorðcund cyning mid gítsunge tó ðæm swíþe undergán, Lchdm. iii. 444, 3. [Ðis maidenes redden ... hu he migten undergon (