ETYMOLOGY
from Latin imperfectus (imperfect), after factious, etc.
EXAMPLE
“…Come hither thou Imperfecksious slaue in
Regard of thy beggery, holde thee theres
Twoshillings for thee? to pay for the
Healing of thy left legge which I meane
Furiously to inuade or to maime at the least. …”
From: A Pleasant Conceited Historie, called The Taming of a Shrew, 1594
Lexicophilia 