ἔκπληξις
From LSJ
δύο ἀρνήσεις μίαν συγκατάθεσιν ποιοῦσι → two negatives make an affirmative
English (LSJ)
εως, ἡ,
A consternation, ἐκπλήξιες τῆς γνώμης Hp.Aër.16, cf.Pl.Phlb.47a, etc.; ἔ. κακῶν terror caused by misfortunes, A.Pers.606; ἔ. παρέχειν Antipho5.6, Th.4.55 ; ἐς ἔ. καθιστάναι, ἀγαγεῖν, Id.6.36, Philostr.Jun.Im.4; ἔ. ἐνέπεσεν ἀνθρώποις Th.4.34. II mental disturbance, passion, Plb.3.81.6.