noun
- substances that make something dirty, contaminated, or of lower quality
Usage: plural form of impurity
Examples
- The water filter removes impurities and bacteria.
- Metal impurities in the gold reduced its value.
- The scientist tested the sample for chemical impurities.
- Air impurities can cause respiratory problems.
- The refining process eliminates most impurities from the oil.
- Skin impurities like dirt and oil can clog pores.