unsweepable

English

Etymology

un- +‎ sweepable

Adjective

unsweepable (not comparable)

1. (military) Of a mine: incapable of being located by minesweeping.
   • 1997, Eric Grove, The Defeat of the enemy attack upon shipping, 1939-1945, page xxxiv:

     We have begun each of our last two wars with the enemy laying unsweepable mines. I shall not dwell on the unsweepable mine of 1914.