n. 副壁

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.