immoral
immoral, unethical
adjective ee-mo-RAL Rare
Origin: French immoral, from Latin in- (not) + moralis (moral), from mores (customs)
Usage Note
Immoral describes behaviour that violates moral standards; the related noun is l'immoralité. French distinguishes immoral (contrary to morality) from amoral (amoral — lacking any moral framework), a distinction worth noting as the two are often conflated. The plural masculine is immoraux.
Examples
"Un tel comportement est profondément immoral."
Natural Translation
Such behaviour is deeply immoral.

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