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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.

Refined olive oil, on the other hand, undergoes industrial processing to remove impurities.

From Science Daily • Apr. 18, 2026

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

A key insight behind the theory is that even very heavy impurities are not perfectly still.

From Science Daily • Feb. 8, 2026

In town he scrutinized the faces of men in the same way that his father searched for impurities in metal.

From "The Underground Railroad: A Novel" by Colson Whitehead