"countermining" in the verb sense
1. sabotage, undermine, countermine, counteract, subvert, weaken
destroy property or hinder normal operations
"The Resistance sabotaged railroad operations during the war"
2. countermine
destroy enemy mines with one's own mines
"We countermined the banks of the river"
Source: WordNet® (An amazing lexical database of English)
Princeton University "About WordNet®."
WordNet®. Princeton University. 2010.
View WordNet® License