When your enemies are undermining you, you must countermine or you'll be blown up.
"Phineas Redux" by Anthony Trollope
After this, twelve small charges of gun-cotton were sunk in various directions, each representing a countermine of 500 pounds.
"In the Track of the Troops" by R.M. Ballantyne
They mine and countermine, until it isn't safe to predict who is immune and who isn't.
"The Brentons" by Anna Chapin Ray
Now, here was a nice plot to face, and countermine!
"The Castaways" by Harry Collingwood
Only a little art-military trick, captain, only countermined, or so.
"The Comedies of William Congreve Volume 1 [of 2]" by William Congreve
The deep mines of sin and of alienation are all undermined and countermined by His love.
"Expositions of Holy Scripture" by Alexander Maclaren
The last few weeks were further enlivened by the knowledge that the Austrians were countermining against us.
"World's War Events, Vol. II" by Various
Countermining.= The enemy, when mining operations are suspected, runs out tunnels to meet the opposing mine.
"Manual of Military Training" by James A. Moss
How dextrous at mining and countermining!
"The Works of Aphra Behn" by Aphra Behn
Unable to detect and countermine me, it was natural that they should become impatient for my removal.
"The International Spy" by Allen Upward
Moreover, it is quite possible that, in any practical implementation, the advantages obtained by considering larger variational ﬁelds would be countermined by “noise” added by considering such order 2 (or larger) neigbourhoods of the given vertex.
Metric Ricci curvature for $PL$ manifolds