unman

v. cause to lose characteristics that are considered to be manly (especially courage); castrate, emasculate

Professor Weston (full name Edward Rolles Weston) is arguably one of C. S. Lewis' greatest satanic characters. An eminent physicist on earth, he first appears in Lewis’ Out of the Silent Planet which is the first in Lewis’s Space Trilogy of science fiction books. He is beaten by the ‘hero’ of the book, Elwin Ransom, and the Oyarsa (which seems to mean something like ruling angel, or ruling power) of Mars (known to the inhabitants as Malacandra), but returns in the second book of the trilogy in an attempt to wreak havoc on Perelandra (Venus), the ‘new Eden’.
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Verb
1. cause to lose one's nerve; "an unmanning experience"
(hypernym) faze, unnerve, enervate, unsettle

(v. t.)
To emasculate; to deprive of virility.
  

(v. t.)
To deprive of the distinctive qualities of a human being, as reason, or the like.
  

(v. t.)
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.
  

(v. t.)
To deprive of men; as, to unman a ship.
  

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