English
imperfectness
From imperfect + -ness.
A compound of imperfect + -ness
Proto-Indo-European *dʰeh₁k-
…
Latin perfectus
Latin imperfectus
Old French imparfit
Middle English imperfit
English imperfect
Today it means
noun The state of being imperfect.
Language periods are conventional ranges, not dates for this word.
Etymograph / imperfectness