im·pu·ri·ty 
/ɪmˈpjurəti/ noun
plural im·pu·ri·ties /ɪmˈpjurəti/ noun 1 [noncount] : the quality or state of being impure
▪ the impurity of the water ▪ moral impurity 2 [count] : an unwanted substance that is found in something else and that prevents it from being pure
▪ The syrup is strained to remove impurities. ▪ The water is free of impurities.
▪ the impurity of the water ▪ moral impurity
▪ The syrup is strained to remove impurities. ▪ The water is free of impurities.
