1. countermine - Noun
2. countermine - Verb
An underground gallery excavated to intercept and destroy the mining of an enemy.
A stratagem or plot by which another sratagem or project is defeated.
To oppose by means of a countermine; to intercept with a countermine.
To frustrate or counteract by secret measures.
To make a countermine or counterplot; to plot secretly.
Source: Webster's dictionaryThe Resistance sabotaged railroad operations during the war Source: Internet
We countermined the banks of the river Source: Internet