At one point she threatens to unman Robin with her dagger, which is unlike the Marians I've known and loved.
From the denverpost.com
Would it truly unman you to put on a tie?
From the eatocracy.cnn.com
We can hope that a great freeze will come and unman the products of brass monkey factories but justice doesn't occur in such convenient ways.
From the post-gazette.com
Gavanelli, in contrast, stands and delivers and keeps his gaze in a middle distance as if to look the dying young woman in the eye would melt his cold heart and unman him.
From the guardian.co.uk
More examples
Cause to lose one's nerve; "an unmanning experience"
Professor Weston (full name Edward Rolles Weston) is arguably one of C. S. Lewis's greatest satanic characters. An eminent physicist on earth, he first appears in Lewisu2019s Out of the Silent Planet, which is the first in Lewisu2019s Space Trilogy...
To castrate; to remove one's manhood; To sap the strength, whether physical or emotional, required to deal with a situation