LATIN DICTIONARYLexicon Latīnum
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“undermine” in Latin

Riddle & Arnold A Copious and Critical English–Latin Lexicon, 1864

undermine
PROP., suffodere (to hollow underneath by digging): subruere (general term, to overthrow from beneath; e.g., a wall): cuniculo or cuniculis subruere or subtrahere (to make a mine under for the purpose of destroying; e.g., a wall. ☞ Plin. uses cavare oppida crebris cuniculis). A town that is undermined, a cuniculis suffossum oppidum.
Figuratively, subruere (to overthrow, destroy; e.g., libertatem): evertere (to overthrow; e.g., rempublicam): labefactare (to make to totter or fall; e.g., rempublicam, amicitiam, justitiam).

Quick answer

What is the Latin word for undermine?
The usual Latin words for “undermine” are suffodiō, cunīculus, subtrahō; also ēvertō, labefactō, lībertās. The right choice depends on the sense; see the distinctions below.

Entry from J. E. Riddle & T. K. Arnold, A Copious and Critical English–Latin Lexicon (rev. C. Anthon, New York: Harper, 1864), digitised by Fergus J. P. Walsh, CC BY-SA 4.0; Latin markup adapted by latindictionary.co.