伦理 lúnlǐ ethics
How to remember 伦理: 伦 human relationships + 理 reason = ethics.
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How it is used
- Ethics / moral order (especially of human relationships) - 医学伦理 (yīxué lúnlǐ) medical ethics.
- 伦 = human relations, so it stresses the moral norms governing relationships (伦理道德, ethics and morality).
- Contrast 道德 (dàodé, morality as personal virtue); 伦理 is the more systematic, often academic/professional principle set.