English → Latin
“unfaithful” in Latin
īnfidēlisunfaithful; treacherous, disloyal; unbelieving, infidelīnfīdusuntrustworthy, incredible; disloyal, unfaithful; uncertain, unsafeperfidusthat breaks one's promise; false; faithless; dishonest; disloyal; deceitful; treacherous; unsafe; dangerousperfidiōsustreacherous, perfidious
Riddle & Arnold A Copious and Critical English–Latin Lexicon, 1864
unfaithful
infidelis (not faithful): infidus (not to be depended on): perfidus: perfidiosus (habitually false, perfidious). To make anybody unfaithful, aliquem fide dimovere; to anybody, aliquem dimovere ab aliquo: to become unfaithful, fidem movere: to be unfaithful to anybody, ab aliquo deficere: aliquem deserere: my memory is unfaithful, memoria labat, mihi non constat, or me deficit: memoria labor: to be unfaithful to one’s duty, ab officio discedere or recedere: to be unfaithful to one’s self, a se desciscere or discedere.
Quick answer
- What is the Latin word for unfaithful?
- The usual Latin words for “unfaithful” are īnfidēlis, īnfīdus, perfidus; also perfidiōsus. 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.