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undermine (v.)
c. 1300, undermyne, "render unstable by digging at the foundation," from under + mine (v.1) "dig." The figurative sense "injure by invisible, secret, or dishonorable means" is attested from early 15c. Similar formation in Dutch ondermijnen, Danish underminere, German unterminiren. The Old English verb was underdelfan. Related: Undermined; undermining.
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Definitions of undermine
Dictionary entries near undermine
underlay
underlie
underline
underling
underlying
undermine
undern
underneath
undernourished
underpants
underpass