良心 (liáng xīn) literally combines 良 (‘good,’ ‘virtuous’) and 心 (‘heart,’ ‘mind’), reflecting the traditional Chinese view that moral awareness resides in the heart-mind. It refers to an internal sense of right and wrong — one’s conscience — guiding ethical judgment and behavior without external enforcement.

This word carries strong moral weight and is often invoked in discussions about integrity, accountability, or social responsibility. It appears frequently in both spoken and written Chinese, especially when appealing to someone’s basic humanity or criticizing hypocrisy or cruelty. Unlike Western notions that may emphasize individual guilt, 良心 often implies a relational, socially grounded morality — acting rightly because one cares about others’ well-being and upholds shared human values.