κἠν
From LSJ
οὐ παντός πλεῖν ἐς Κόρινθον → it's not for every man to make a journey to Corinth, not everyone can afford a trip to Corinth
German (Pape)
[Seite 1431] dor. = κἀν, d. i. καὶ ἐν.
Greek (Liddell-Scott)
κἠν: Δωρ. κρᾶσις, ἀντὶ τοῦ καὶ ἐν, Θεόκρ. 15. 86· ― ἀλλὰ κἢν ἀντὶ καὶ ἄν, 7. 106, κ. ἀλλ.