ἐπεί conjunct., temporal and causal, like Lat. quum: OF TIME, after that, after (postquam), since, when (quum), with aor. to express a complete action, or imperf. to express one not yet complete, ἐπεὶ ὑπηντίαζεν ἡ φάλαγξ καὶ ἡ σάλπιγξ ἐφθέγξατο after the phalanx began to advance and the trumpet had sounded, Xen. = ἐξ οὗ, from the time when, ever since, ἐπείτε παρέλαβον τὸν θρόνον since I came to the throne, Hdt. with Subjunct., ἄν or κε being added, so that ἐπεί becomes ἐπάν, ἐπήν, Ionic ἐπεάν, or ἐπεί κε: — referring to future time, ἐπὴν ἕλωμεν when we shall have taken the city, Il.:—also whenever, ἐπεί κε λίπῃ ὀστέα θυμός Od. with Opt. without ἄν, referring to future time, ἐπειδὴ πρὸς τὸ φῶς ἔλθοι after he had come into the light, Plat.:—also whenever, ἐπεὶ πύθοιτο Xen. in oratione obl. after past tenses, representing a subj. in orat. rect., ἐπεὶ διαβαίης, the direct form being ἐπὴν διαβῶ, Xen. with other words, ἐπεὶ τάχιστα, as soon as, Lat. quum primum, Xen.; ἐπεὶ εὐθέως Xen.; ἐπειδὴ τάχιστα Plat.; ἐπειδὴ θᾶττον Dem. CAUSAL, since, seeing that, with Ind. or Opt. with ἄν, Hom., etc.; with Imp., ἐπεὶ δίδαξον for teach me, Soph.; ἐπεὶ πῶς ἂν καλέσειας; for how would you call him? Ar.:—sometimes it may be rendered by although, or by else, otherwise. with other Particles, ἐπεὶ ἄρα, ἐπεὶ ἂρ δή since then, Od.; ἐπεί γε, Lat. quandoquidem, since indeed, Hdt.; ἐπείπερ seeing that, Aesch., etc.; ἐπεί τοι since surely, Soph.