δισσολογέω
From LSJ
δύο ἀρνήσεις μίαν συγκατάθεσιν ποιοῦσι → two negatives make an affirmative
English (LSJ)
Att. διττ-,
A say twice, repeat, as in phrases like ἄπιστ' ἄπιστα, καινὰ καινά, Sch.E. Hec.688; go over again, Vett.Val.249.20. II call in question, leave doubtful, Simp. in Cael.194.17.