noun
inhumanity; inhuman nature
Abstract noun referring to the quality of being inhumane or lacking compassion; often used in discussions of ethics, war, or systemic cruelty.
戦争の非人道性を訴える。
They denounce the inhumanity of war.
その政策の非人道性が批判された。
The inhuman nature of the policy was criticized.
Adjectival form meaning 'inhumane' or 'inhuman'; 非人道性 is the noun form referring to the quality or nature of being inhumane.
Compound of 非 (hi-, 'non-'), 人道 (jindō, 'humanity'), and 性 (-sei, '-ness'). The exact historical derivation is uncertain, but the word follows a common pattern for abstract nouns.