Countermine

Normally the threat would have been dealt with by means of a counter-mine, but the tunnel was now far too close for that.

Thinking himself contemned, knowing no countermine against contempt but terror.

[…] every gamester will agree how necessary it is to know exactly the play of another, in order to countermine him.

[…]so Fritz could sleep easily in his trench, so far as mines were concerned; and Fritz, confident in his Herr Professors, altogether neglected any attempt to counter-mine.