impure
Definitions
Not pure; mixed with foreign matter or contaminants.
Morally wrong, unchaste, or lacking in spiritual purity.
Not chemically or structurally homogeneous.
Examples
The chemist warned that the water sample was impure and unsuitable for the experiment.
He felt that his motives were impure, driven more by greed than by a genuine desire to help.
Synonyms
contaminated polluted adulterated tainted unrefined debased corrupt