v. t.
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 ]
v. t. [ De- + nature. ] To deprive of its natural qualities; change the nature of. [ Webster 1913 Suppl. ]
v. i. To become denatured. [ PJC ]
adj. changed in nature or natural quality.