countermine

coun·ter·mine  (kountr-mn)

v. coun·ter·mined, coun·ter·min·ing, coun·ter·mines

v.tr.

1. To frustrate or defeat by secret and opposite measures.

2. To make or use a countermine against.

v.intr.

To make or lay down countermines.

n. (kountr-mn)

1. A tunnel dug to intercept and destroy an enemy's mine.

2. A plot to frustrate or defeat an attack.

Thesaurus

Noun	1.	countermine - (military) a tunnel dug to defeat similar activities by the enemy countermeasure - an action taken to offset another action armed forces, armed services, military, military machine, war machine - the military forces of a nation; "their military is the largest in the region"; "the military machine is the same one we faced in 1991 but now it is weaker"
Verb	1.	countermine - destroy property or hinder normal operations; "The Resistance sabotaged railroad operations during the war" sabotage, undermine, weaken, subvert, counteract derail - cause to run off the tracks; "they had planned to derail the trains that carried atomic waste" disobey - refuse to go along with; refuse to follow; be disobedient; "He disobeyed his supervisor and was fired"
	2.	countermine - destroy enemy mines with one's own mines; "We countermined the banks of the river" mine - lay mines; "The Vietnamese mined Cambodia"

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To explode the main charge in a mine by the shock of a nearby explosion of another mine or independent explosive charge. The explosion of the main charge may be caused either by sympathetic detonation or through the explosive train and/or firing mechanism of the mine.