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impurities

NOUN

contaminant

Synonyms

STRONGEST

contamination grime pollutant scum

STRONG

adulteration corruption defilement dirt filth pestilence poisoning pollution stain taint uncleanness

WEAK

foreign matter

Antonyms

STRONGEST

cleanliness

STRONG

pureness purification purity sterility

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The manufacturing process can also introduce impurities — like bacteria or heavy metals — into peptide drugs.

From Salon • Apr. 4, 2026

Ice masters look at the PH levels of the water and purify it to remove minerals and impurities.

From BBC • Feb. 10, 2026

Novo Nordisk referenced the FDA's concerns in its lawsuit announcement on Monday, saying Hims & Hers' compounded drugs "may contain dangerous impurities or incorrect amounts of active ingredients, which can result in life-threatening immune responses".

From BBC • Feb. 10, 2026

Prof. Schmidt says the new results offer a flexible way to describe impurities that can be applied across different dimensions and interaction types.

From Science Daily • Feb. 8, 2026

As an example of how Boyle approached alchemy in a scientific way, he took issue with the idea that gold could be made by removing impurities from other metals.

From "The Scientists" by John Gribbin