The Collaborative International Dictionary
Improbity
Improbity \Im*prob"i*ty\, n. [L. improbitas; pref. im- not + probitas probity: cf. F. improbit['e].] Lack of probity; lack of integrity or rectitude; dishonesty.
Persons . . . cast out for notorious improbity.
--Hooker.
Wiktionary
improbity
n. A lack of probity, honesty or integrity