ἐστί
From LSJ
ἀμήχανον δὲ παντὸς ἀνδρὸς ἐκμαθεῖν ψυχήν τε καὶ φρόνημα καὶ γνώμην, πρὶν ἂν ἀρχαῖς τε καὶ νόμοισιν ἐντριβὴς φανῇ → hard it is to learn the mind of any mortal or the heart, 'till he be tried in chief authority | it is impossible to know fully any man's character, will, or judgment, until he has been proved by the test of rule and law-giving
French (Bailly abrégé)
3ᵉ sg. prés. de εἰμί.
English (Strong)
third person singular present indicative of εἰμί; he (she or it) is; also (with neuter plural) they are: are, be(-long), call, X can(-not), come, consisteth, X dure for a while, + follow, X have, (that) is (to say), make, meaneth, X must needs, + profit, + remaineth, + wrestle.
Russian (Dvoretsky)
ἐστί: 3 л. sing. praes. к εἰμί.
