εἶναι
From LSJ
ἔστιν δέ που ἡ μὲν ἐπὶ σώμασι γυμναστική, ἡ δ' ἐπὶ ψυχῇ μουσική → I think I am right in saying that we have physical exercise for the body and the arts for the soul
French (Bailly abrégé)
inf. de εἰμί.
Greek (Liddell-Scott)
εἶναι: ἀπαρ. τοῦ εἰμὶ (ὑπάρχω). ΙΙ. ἐν Ἡσ. Ἔργ. κ. Ἡμ. 351 τῷ προσιόντι προσεῖναι (ἔνθα κεῖται αντὶ του προσιέναι, ἀπαρ. τοῦ πρόσειμι, πλησιάζω) πιθανῶς εἶναι ἐφθαρμένον.
English (Strong)
present infinitive from εἰμί; to exist: am, was. come, is, X lust after, X please well, there is, to be, was.
Greek Monotonic
εἶναι:I. απαρ. του εἰμί (sum).
II. στον Ησίοδ., αντί ἰέναι, απαρ. του εἶμι (ibo, προχωρώ).
Russian (Dvoretsky)
εἶναι: inf. к εἰμί.
Greek > English (Woodhouse Verbs Reversed)
(see also εἰμί): be, belong to, constitute, exist, be at the beck of