countermine

IPA: kˈaʊnɝmaɪn

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.

Examples of "countermine" in Sentences

Keep a good lookout for the countermine which is now working against the good advice of his Majesty for mutual toleration.
I think such a thing would actually countermine a lot of his message, which was that nature could be approachable by anyone.
The question set a light to a train — and angry suspicions were blazing up one after another, but Amyas silenced them with a countermine.
Mingle in their follies, and see they cover not deeper designs under the appearance of female levity — if they do mine, do thou countermine.
But Gertrude had no doubt that she was closely watched, and in these circumstances was driven to think how she could best use her wits so as to countermine her father.
The reader will pardon a digression in which so invaluable a secret is communicated, since every gamester will agree how necessary it is to know exactly the play of another, in order to countermine him.
Post-cold-war subjects have been inserted into the curriculum, such as "countermine operations," to instruct Central American soldiers on clearing the 130,000 mines laid during the wars of the 1980s, and "resource management," a euphemism for teaching Latin officers to keep their hands out of the till.