The Word of the Day for July 17, 2026, is obdurate. Obdurate is a formal adjective meaning resistant to persuasion. It typically describes someone unwilling to change their methods or opinions. It can also refer to something that is not easily altered. For instance, an organization with obdurate problems might still make changes under new leadership. The word is used when careers end against obdurate wills. Someone with an obdurate disposition can be difficult to persuade. The word obdurate shares etymological roots with dour, endure, and durable. All these words derive from the Latin for "hard." This connection highlights the inherent stubbornness or resilience implied by obdurate.