πολλοὶ γάρ εἰσιν κλητοὶ ὀλίγοι δὲ ἐκλεκτοί → many are called, but few are chosen
Source
French (Bailly abrégé)
crase poét. p. καὶ εἰ.
Russian (Dvoretsky)
κεἰ: in crasi = καὶ εἰ.
Dutch (Woordenboekgrieks.nl)
κεἰ of κεί of κεἴ crasis voor καὶ εἰ.
English (Woodhouse)
even if