1. to deprive of courage, strength, or vigor; to make weak or ineffective
Usage: formal
2. to remove the crew from a ship or other vessel
Usage: nautical

Examples

• The tragic news seemed to unman the usually confident leader.
• Fear of failure can unman even the most determined athlete.
• The captain decided to unman the damaged vessel before it sank.
• Grief threatened to unman him at his father’s funeral.
• The overwhelming responsibility began to unman the young executive.
• They had to unman the ship quickly during the emergency evacuation.