countermine
noun
1. (military) a tunnel dug to defeat similar activities by the enemy
Definition categories: act, countermeasure
verb
1. destroy property or hinder normal operations
Similar word(s): counteract, sabotage, subvert, undermine, weaken
Definition categories: social, disobey
2. destroy enemy mines with one's own mines
- We countermined the banks of the river
Definition categories: competition, mine