εἰσί
From LSJ
Ἔοικα γοῦν τούτου γε σμικρῷ τινι αὐτῷ τούτῳ σοφώτερος εἶναι, ὅτι ἃ μὴ οἶδα οὐδὲ οἴομαι εἰδέναι → I seem, then, in just this little thing to be wiser than this man at any rate, that what I do not know I do not think I know either
English (LSJ)
3pl. of εἰμί (A sum). εἶσι, 3sg. of εἶμι (ibo). εἰσῐδεῖν, Ep. εἰσιδέειν, aor. inf. of εἰσεῖδον; v. εἰσοράω.
Greek (Liddell-Scott)
εἰσί: εἰσίν, γ΄ πληθ. τοῦ εἰμὶ (ὑπάρχω).
French (Bailly abrégé)
3ᵉ pl. prés. de εἰμί.
English (Strong)
3rd person plural present indicative of εἰμί; they are: agree, are, be, dure, X is, were.
Greek Monotonic
εἰσί: εἰσίν, γʹ πληθ. του εἰμί (sum).
Russian (Dvoretsky)
εἰσί: 3 л. pl. praes. к εἰμί.