The Collaborative International Dictionary
Unperfectness
Unperfect \Un*per"fect\, a. [Pref. un- + perfect.]
Imperfect. [Obs.]
--Holland. -- Un*per"fect*ly, adv. [Obs.]
--Hales. -- Un*per"fect*ness, n. [Obs.]
Wiktionary
unperfectness
n. Quality of being unperfect.