τηρητής
From LSJ
μή μοι θεοὺς καλοῦσα βουλεύου κακῶς· πειθαρχία γάρ ἐστι τῆς εὐπραξίας μήτηρ, γυνὴ Σωτῆρος· ὦδ᾽ ἔχει λόγος → When you invoke the gods, do not be ill-advised. For Obedience is the mother of Success, wife of Salvation—as the saying goes.
English (LSJ)
οῦ, ὁ,
A keeper, observer, δίκης D.S.3.4. 2 guard, warden, PMich.Zen.84.10 (iii B.C.), PLond.3.1171.57 (i B.C.), PAmh.2.126.22 (ii A.D.), etc.
German (Pape)
[Seite 1108] ὁ, Bewahrer, Beobachter, Sp.