not honest, fair, or morally right; breaking the rules of what is considered acceptable behavior.
From the prefix 'un-' meaning not, plus 'ethical' from Greek 'ethikos' meaning 'of character.' Combined, it means lacking moral character or principles.
What's considered 'unethical' actually changes over time and between cultures—things that were once considered ethical (like slavery) are now seen as deeply unethical, showing that morality evolves!
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