1. causing someone to lose confidence, hope, or determination; disheartening
Usage: British spelling (American: demoralizing); commonly used in contexts of setbacks, defeats, or discouraging news

Examples

• The team's demoralising loss in the final match left them devastated.
• Repeated failures can be demoralising for even the most determined students.
• The demoralising news about the company layoffs spread quickly through the office.
• Losing the championship was a demoralising experience for the entire squad.
• The harsh criticism had a demoralising effect on the young artist's confidence.
• Despite the demoralising circumstances, the group refused to give up.