ἔξεστι
éxesti
ex-on'
third person singular present indicative of a compound of ἐκ and εἰμί; so also ἐξόν neuter present participle of the same (with or without some form of εἰμί expressed); impersonally, it is right (through the figurative idea of being out in public).

KJV translates as: be lawful, let, X may(est)