ζῆσις
From LSJ
ἀσκεῖν περὶ τὰ νοσήματα δύο, ὠφελεῖν ἢ μὴ βλάπτειν → strive, with regard to diseases, for two things — to do good, or to do no harm | as to diseases, make a habit of two things — to help, or at least, to do no harm
English (LSJ)
-εως, ἡ, vitalization, Dam.Pr.83bis.
Greek (Liddell-Scott)
ζῆσις: -εως, ζωή, Στοβ. Ἐκλ. Φυσ. 262.