deceptive Copy link Outline 1. fallax, ācis2. mendax, ācis3. vānus (i. e. empty, unreal) • deceptive: 1. fallax, ācis: d. merchandise, fallaces merces, Cic. 2. mendax, ācis: a d. mirror, m. speculum, Ov. 3. vānus (i. e. empty, unreal): to trust to d. speech, vanae orationi credere, Cic.: v. false, deceitful.