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Dishearten
means to make someone lose hope, confidence, or enthusiasm. It’s when something discouraging happens, and you feel like giving up.

Examples:
1- After getting a poor review, the chef decided not to let it dishearten her. She spent the next week refining her recipe and wowed the judges at the next competition.
2- Walt Disney was disheartened when a newspaper editor told him he lacked creativity. Despite the criticism, he pursued his dreams and eventually created the iconic Disney empire.