undermine in French
undermine in French
saper
To dig underneath (something), to make a passage for destructive or military purposes; to sap. [from 14th c.]
saper
(figuratively) To weaken or work against; to hinder, sabotage. [from 15th c.]
miner
(figuratively) To weaken or work against; to hinder, sabotage. [from 15th c.]