Obdurate

Obdurate: Stubborn - hard against. Obdurate shares its etymology with durable, during, endure, durum wheat, and durometer, many connecting hardness with lasting and durable.

Certainly, Stanton's spine was stiffened by the controversies, and she plunged into the future with characteristic steadfastness, over obduracy.

A Book for Today: Elizabeth Cady Stanton by Lori D Ginzberg