Webster's Revised Unabridged Dictionary · 1913

Unman

Unman , transitive verb

[1st pref. un- + man.]

1.
To deprive of the distinctive qualities of a human being, as reason, or the like. [Rare] — South
2.
To emasculate; to deprive of virility.
3.
To deprive of the courage and fortitude of a man; to break or subdue the manly spirit in; to cause to despond; to dishearten; to make womanish.
Let's not unman each other. — Byron
4.
To deprive of men; as, to unman a ship.