Countermure
Coun"ter*mure`\ (-m?r`), n. [Counter- + mure: cf. F. contremur.] (Fort.) A wall raised behind another, to supply its place when breached or destroyed. [R.] Cf. Contramure. --Knolles.Countermure
Coun`ter*mure"\ (koun`t?r-m?r"), v. t. [imp. & p. p. Countermured (-m?rd"); p. pr. & vb. n. Countermuring.] [Cf. F. contremurer.] To fortify with a wall behind another wall. [R.] --Kyd.