noun which may take the genitive case particle 'no', noun
Describes behavior, especially sexual conduct, that violates moral standards. Often used in formal or critical contexts.
彼は乱倫な行為で非難された。
He was criticized for his immoral conduct.
その政治家の乱倫な関係がスキャンダルになった。
The politician's unethical relationship became a scandal.
Compound of 乱 (disorder, chaos) and 倫 (ethics, moral principles). The exact historical derivation is uncertain, but the combination conveys a violation of moral order.