countermuring

Verb

countermure (third-person singular simple present countermures, present participle countermuring, simple past and past participle countermured)

1. (transitive) To fortify with a wall behind another wall.
   • 15??, Thomas Kyd, The Spanish Tragedy
     They are plac'd in those empyreal heights,
     Where, counter-mur'd with walls of diamond,
     I find the place impregnable.

See all 2 meanings of countermure