Which word is synonymous with "obdurate" in the context of stubbornness?

The word "obdurate" refers to a stubbornness that is often associated with an unwillingness to change one's mind or to be influenced. It conveys a sense of hardness or resistance to persuasion. In this context, the choice that aligns most closely with this meaning is "resistant."

"Resistant" indicates a refusal to give in or change, which directly relates to the unwavering nature suggested by "obdurate." This connection makes it the correct choice, as it encapsulates that essence of stubbornness and refusal to be swayed.

In contrast, the other options represent qualities that are oppositional to "obdurate." "Flexible," "accommodating," and "submissive" all suggest a willingness to adapt or yield, which contradicts the meaning of being unyielding or inflexible as seen with "obdurate." Therefore, "resistant" is the most fitting synonym in reflecting the idea of stubbornness.