εἰσί
From LSJ
Σιγή ποτ' ἐστὶν αἱρετωτέρα λόγου → Sometimes silence is preferable to words → Est ubi loquelā melius est silentium → Das Schweigen ist dem Reden manchmal vorzuziehn
English (LSJ)
3pl. of εἰμί (sum). εἶσι, 3sg. of εἶμι (ibo). εἰσῐδεῖν, Ep. εἰσιδέειν, aor. inf. of εἰσεῖδον; v. εἰσοράω.
French (Bailly abrégé)
3ᵉ pl. prés. de εἰμί.
Russian (Dvoretsky)
εἰσί: 3 л. pl. praes. к εἰμί.
Greek (Liddell-Scott)
εἰσί: εἰσίν, γ΄ πληθ. τοῦ εἰμὶ (ὑπάρχω).
English (Strong)
3rd person plural present indicative of εἰμί; they are: agree, are, be, dure, X is, were.