(adj.adv.) : mendax, dācis, adj.mentior
* Given to lying, mendacious; subst., a liar.
* Lit.: mendacem esse adversus aliquem,Plaut. Poen. 1, 2, 188: cum mendaci homini, ne verum quidem dicenti, credere soleamus,Cic. Div. 2, 71, 146: Carthaginienses fraudulenti et mendaces,id. Agr. 2, 35, 95: aretalogus,Juv. 15, 16.—As subst.: mendax, dācis, m., a liar.—Prov.: mendacem memorem esse oportet,a liar should have a good memory,Quint. 4, 2, 91.— Comp.: Parthis mendacior,Hor. Ep 2, 1, 112.—Sup.: mendacissimus,the greatest liar,Plaut. Rud. 3, 4, 48.—With gen.: si hujus rei me mendacem esse inveneris,Plaut. As. 5, 2, 4.—With dat.: saepe fui mendax pro te mihi,Ov. H. 2, 11.—With in and acc.: in parentem,Hor. C. 3, 11, 35; for which adversum, Plaut. Poen. 1, 2, 188.— With in and abl.: in tenui farragine,Pers. 5, 77.
* Transf., of inanim, and abstr. things, lying, false, deceptive; feigned, fictitious, counterfeit, not real, etc. (mostly poet.): mendacia visa,Cic. Div. 2, 62, 127: speculum,Ov. Tr. 3, 7, 38: fundus,that does not yield the expected fruits,Hor. C. 3, 1, 30: damnum,Ov. A. A. 1, 431: infamia,Hor. Ep. 1, 16, 39: os,Tib. 3, 6, 35: pennae,Ov. M. 10, 159: quidquid Graecia mendax audet in historia,Juv. 10, 174.—Hence, adv.: mendācĭter, falsely, mendaciously (post-class.): praedicare,Sol. 1, 87.— Sup.: mendacissime dicere,Aug. Mor. Eccl. 1, 17.

s. TLL