v. Obs.1 [UNDER-1 4 a.] trans. To undermine.

1

  The second element, which rhymes with sleye ‘sly,’ may be MYE v. in a forced sense.

2

c. 1330.  R. Brunne, Chron. Wace (Rolls), 3432. Mynours þey hadde ynowe, & sleye, Þe wal to perce & undermye.

3