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“dishonesty” in Latin

Riddle & Arnold A Copious and Critical English–Latin Lexicon, 1864

dishonesty
Want of honesty, improbitas: infidelitas: perfidia [SYN. in DISHONEST]: fraus (especially of a single act; e.g., fraude perspecta, Caes.): fraus et malitia.
Unchastity, impuritas; impudicitia; libidines [SYN. in UNCHASTE].
Deceit; Vid.

Quick answer

What is the Latin word for dishonesty?
The usual Latin words for “dishonesty” are improbitās, īnfidēlitās, perfidia; also fraus, impūritās, impudīcitia. The right choice depends on the sense; see the distinctions below.

Entry from J. E. Riddle & T. K. Arnold, A Copious and Critical English–Latin Lexicon (rev. C. Anthon, New York: Harper, 1864), digitised by Fergus J. P. Walsh, CC BY-SA 4.0; Latin markup adapted by latindictionary.co.