In facing up to his dilemma, the hero must also face up to his unmanliness.
From the time.com
This usage can also refer to weakness or unmanliness.
From the en.wikipedia.org
To exponents of Muscular Christianity such as Charles Kingsley, celibacy was synonymous with unmanliness.
From the en.wikipedia.org
Beneath the worldliness there is an anxious young man who equated his sensitivities and illnesses with unmanliness.
From the time.com
Meanwhile, House diagnoses Wilson with a serious case of unmanliness because he has adopted Sarah, a diabetic cat.
From the healthland.time.com
More examples
Effeminacy: the trait of being effeminate (derogatory of a man); "the students associated science with masculinity and arts with effeminacy"; "Spartans accused Athenians of effeminateness"; "he was shocked by the softness of the atmosphere surrounding the young prince, arising from the ...