ζῆσις
From LSJ
περὶ οὐδὲν γὰρ οὕτως ὑπάρχει τῶν ἀνθρωπίνων ἔργων βεβαιότης ὡς περὶ τὰς ἐνεργείας τὰς κατ' ἀρετήν → since none of man's functions possess the quality of permanence so fully as the activities in conformity with virtue
English (LSJ)
εως, ἡ,
A vitalization, Dam.Pr.83bis.
Greek (Liddell-Scott)
ζῆσις: -εως, ζωή, Στοβ. Ἐκλ. Φυσ. 262.