gainsay
From LSJ
English > Greek (Woodhouse)
verb transitive
contradict: P. and V. ἀντιλέγειν (dat.), ἀντειπεῖν (dat.), P. ἐναντιολογεῖν (dat.), V. ἀντιφωνεῖν (absol.).
oppose: P. and V. ἐναντιοῦσθαι (dat.); see oppose.
deny: P. and V. ἀρνεῖσθαι, ἀπαρνεῖσθαι, καταρνεῖσθαι; see deny.