The Collaborative International Dictionary
Unpureness
Unpure \Un*pure"\, a. Not pure; impure. [1913 Webster] -- Un*pure"ly, adv. -- Un*pure"ness, n.
Wiktionary
unpureness
n. 1 (context uncountable English) The state or quality of being unpure; impurity. 2 (context countable English) That which is unpure; an impurity.