<p><strong>Adjective</strong></p><ul><li>unable to bend or be penetrated under pressure; hard: The unyielding metal door resisted the intruder's attempts to force it open.</li><li>not apt to give way under pressure; inflexible; firm: Despite her injuries, she maintained an unyielding determination to complete the marathon.</li></ul><p><strong>End of Response</strong></p>