Countermine

·vt To frustrate or counteract by secret measures.

II. Countermine ·vi To make a countermine or counterplot; to plot secretly.

III. Countermine ·noun A stratagem or plot by which another sratagem or project is defeated.

IV. Countermine ·vt To oppose by means of a countermine; to intercept with a countermine.

V. Countermine ·noun An underground gallery excavated to intercept and destroy the mining of an Enemy.