UNDERMINE, UNDERMINED
ADJECTIVES
1340 — YDOLVE undermined; buried → obs.
VERBS
1660 — CRY STINKING FISH to disparage or undermine one’s own efforts or products; to put oneself down
1788 — UNDERMIND to undermine → Amer. dial.
1875 — QUEER A PITCH to undermine someone’s efforts; to spoil a situation or a circumstance → UK sl.
..L19 — SPIKE to undermine, to harm → sl.
1905 — UNDER-GRUB to undermine → Eng. dial. (Bk.)
Lexicophilia 