ἐξαπίναιος
From LSJ
πᾶσα γυνὴ τοῦ λύχνου ἀρθέντος ἡ αὐτή ἐστι → all women are the same in the dark, all women are the same when the lights go out
English (LSJ)
proparox., or ἐξαπῐν-αῖος, α, ον, or ος, ον,
A = ἐξαιφνίδιος, Hp.Acut.28, X.Hier.10.6, Plb.25.2.1, Call.Jov.50, Ruf. ap. Orib.6.38.25. Adv. -ως Hp.Art.43, Th.3.3, al.