unfaithful Copy link Outline 1. infīdus2. infĭdēlis3. perfĭdus4. perfĭdiōsus (u. by habit)5. mendax, ācis6. incūriōsus (inaccurate, wanting in research) • unfaithful: 1. infīdus: u. friends, i. amici, Cic. Am. 15, 53: the u. state of the Rhodians, i. civitas Rhodiorum, Sall. Cat. 51. 2. infĭdēlis: i. Allobrox, Hor. Epod. 16, 6. 3. perfĭdus: u. friends, p. amici, Cic. Red. Quir. 9, 21. 4. perfĭdiōsus (u. by habit): p. in amicitia, id. Fam. 3, 10, med. 5. mendax, ācis: an u. mirror, speculum m., Ov. Trist. 3, 7, 38: v. faithless, false, untrue. 6. incūriōsus (inaccurate, wanting in research): i. historia, Suet. Galb. 3.