vt. 使失去男子气概, 使怯懦, 使气馁

[ verb ]
cause to lose one's nerve
<verb.emotion>
an unmanning experience

Unman \Un*man"\, v. t. [1st pref. un- + man.]
1. To deprive of the distinctive qualities of a human being,
as reason, or the like. [R.] --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.