countermine

== English == === Etymology === From counter- +‎ mine. === Pronunciation === === Noun === countermine (plural countermines) A mine used by defenders to intercept an enemy mine or tunnel. An underground gallery excavated to intercept and destroy the mining of an enemy. A stratagem or plot by which another stratagem or project is defeated. === Verb === countermine (third-person singular simple present countermines, present participle countermining, simple past and past participle countermined) To plot opposition; to frustrate the initiatives of another. (transitive, intransitive) to sap hostile mining. ==== Synonyms ==== (to plot opposition): counterplot