ὑπερίστωρ
From LSJ
ἀσκέειν, περὶ τὰ νουσήματα, δύο, ὠφελέειν, 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)
ορος, ὁ, ἡ,
A knowing but too well, c. gen., S.El.850 (lyr.).
German (Pape)
[Seite 1197] ορος, ὁ, ἡ, mehr als zu Viel wissend, nur zu gut wissend, τινός, Soph. El. 840.
Greek (Liddell-Scott)
ὑπερίστωρ: -ορος, ὁ, ἡ, ὁ γινώσκων πολὺ καλῶς, μετὰ γεν., Σοφ. Ἠλ. 850.