A substance or element that contaminates or makes something less pure, or morally unclean thoughts or behaviors.
From Latin 'impuritas' (im- 'not' + purus 'pure'), entered Middle English meaning physical or spiritual contamination; used in chemistry, medicine, and morality.
Silicon chips are graded by their impurities down to the atomic level—a single impure atom can ruin an entire transistor, which is why semiconductor manufacturing is done in rooms cleaner than operating rooms.
Purity/impurity language has been weaponized against women—especially regarding sexual status—since ancient times. Terms like 'impurity' historically criminalized women's sexuality while exempting men from same moral scrutiny.
Limit to technical/scientific contexts (chemical impurity, data impurity). Avoid in discussions of human value, morality, or sexuality.
["contamination","mixture","adulteration"]
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