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ἔσται

Ὁ δ' ἀνεξέταστος βίος οὐ βιωτὸς ἀνθρώπῳ -> The unexamined life is not worth living
Plato, Apology of Socrates 38a

French (Bailly abrégé)

3ᵉ sg. fut. de εἰμί.

Russian (Dvoretsky)

ἔσται: 3 л. sing. fut. к εἰμί.