The Collaborative International Dictionary
Unacquaintance
Unacquaintance \Un`ac*quaint"ance\, n. The quality or state of being unacquainted; want of acquaintance; ignorance.
He was then in happy unacquaintance with everything
connected with that obnoxious cavity.
--Sir W.
Hamilton.
Wiktionary
unacquaintance
n. The state or condition of being unacquainted; unfamiliarity with something.