IPA: /ʌnˈmæn.lɪ.nəs/
KK: /ʌnˈmæn.lɪ.nəs/
The quality or state of not being manly; often associated with traits considered weak or feminine.
He was criticized for his unmanliness in a society that values traditional masculinity.
Unmanliness → It is formed from "un-" (meaning not) and "manliness" (from "manly" which comes from Old English "manlic", meaning having the qualities of a man). The word "unmanliness" means the state of not possessing the qualities traditionally associated with being a man, such as strength or courage.
Think of 'not' ('un-') having the qualities of a 'man' ('manliness') — that's why unmanliness refers to lacking those traditional masculine traits.