προσκαρτέρησις
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,
A perseverance, patience, Phld.Rh.1.11 S., Ep.Eph.6.18.
German (Pape)
[Seite 767] ἡ, Beharrlichkeit, Ausdauer bei Etwas, Sp.