%denaturalize%

v. t. [ imp. & p. p. Denaturalized p. pr. & vb. n. Denaturalizing. ] [ Cf. F. dénaturaliser. ] 1. To render unnatural; to alienate from nature. [ 1913 Webster ]

2. To renounce the natural rights and duties of; to deprive of citizenship; to denationalize. [ R. ] [ 1913 Webster ]

They also claimed the privilege, when aggrieved, of denaturalizing themselves, or, in other words, of publicly renouncing their allegiance to their sovereign, and of enlisting under the banners of his enemy. Prescott. [ 1913 Webster ]

3. same as denature. [ PJC ]