countermine

Noun

• (military) a tunnel dug to defeat similar activities by the enemy

Verb

• destroy enemy mines with one's own mines
  • We countermined the banks of the river
    

• destroy property or hinder normal operations
  • The Resistance sabotaged railroad operations during the war
    

Related words

• Synonyms: 
  sabotage , undermine , counteract , subvert , weaken