To deprive of courage or fortitude; to cause to lose composure or self-control. The unexpected news seemed to unman him, leaving him speechless and shaken.
To remove or deprive of qualities traditionally associated with men, such as strength or bravery. The constant criticism from his peers began to unman him, making him doubt his abilities.
To remove personnel from (a vehicle, installation, or system), allowing it to operate without a human crew. The engineers plan to unman the station and control it entirely from the mainland.