ἀρνητής

From LSJ

Ἀδώνι' ἄγομεν καὶ τὸν Ἄδωνιν κλᾴομεν → We conduct the rites of Adonis, we weep for Adonis (Pherecrates, fr. 170)

Source

Spanish (DGE)

-οῦ
falsario, falaz Aq.Is.30.9, del Anticristo, 1Apoc.6
lat. negator, infitiator, Gloss.2.245.