What is to inclose, as with pales or stakes; to surround. Impale him with your weapons round about. Shak. Impenetrable, impaled with circling fire. Milton called?

impale — To inclose, as with pales or stakes; to surround. Impale him with your weapons round about. Shak. Impenetrable, impaled with circling fire. Milton. (Webster's 1913.)

Sources