impure
word
Definition
Not clean or pure; containing other unwanted substances or mixed with something else. Can also describe things that are morally questionable.
Usage & Nuances
Formal and scientific contexts often use 'impure' to describe substances. It can also be used metaphorically for moral failings. Common collocations: 'impure water', 'impure thoughts'. Do not confuse with 'unclean' (dirtiness) or 'polluted' (environment).
Example Sentences
This salt is impure, so it cannot be used in the laboratory.
basic
The river water became impure after the factory opened.
basic
Jewelry made from impure gold is less valuable.
basic
If the air feels impure, it's probably because of the smoke from traffic.
natural
He tries to avoid impure thoughts and stay focused on his work.
natural
After the scandal, many people considered the organization impure.
natural