κἀς
From LSJ
τίς δ' οἶδεν εἰ τὸ ζῆν μέν ἐστι κατθανεῖν, τὸ κατθανεῖν δὲ ζῆν κάτω νομίζεται → who knows if life is death, and if in the underworld death is considered life
English (LSJ)
crasis for καὶ εἰς, or καὶ ἐς, Ar.Ach.184, etc.
German (Pape)
[Seite 1332] = καὶ ἐς, Ar. Ach. 184 Av. 949 u. sonst Comic.
Dutch (Woordenboekgrieks.nl)
κἀς crasis voor καὶ ἐς.
Russian (Dvoretsky)
κἀς: in crasi = καὶ ἐς.
Greek (Liddell-Scott)
κἀς: κατὰ κρᾶσιν ἀντὶ τοῦ καὶ εἰς ἢ καὶ ἐς, π.χ. Ἀριστοφ. Ἀχ. 184, Ὄρν. 949, κτλ.
Greek Monotonic
κἀς: κράση αντί καὶ εἰς ή καὶ ἐς.