morality; ethicality
Refers to the quality of being moral or ethical, often used in discussions of principles, character, or the ethical dimension of actions and systems.
His actions lack morality.
We need to discuss the ethicality of this law.
道徳性 is similar but leans more toward personal moral character or virtue, whereas 倫理性 often implies a more systematic or philosophical ethical dimension.
Compound of 倫理 (ethics, from Chinese 倫理) and 性 (nature, quality). The exact historical derivation is uncertain, but the word follows a common pattern for abstract nouns in modern Japanese.