IPA: /ˈpjʊrnəs/
KK: /ˈpjʊrnəs/
The state of being free from any contamination or impurities; the quality of being clean and untainted.
The pureness of the water in the mountain stream was remarkable.
Pureness → It is formed from "pure" (from Old French *pur*, meaning clean or untainted) and "-ness" (meaning the state or quality of). The word "pureness" refers to the state of being pure or free from contamination.
Think of the word 'pure' meaning clean or untainted, and remember that 'pureness' describes the quality of being pure.