πεδιοφύλαξ
From LSJ
ψυχῆς πείρατα ἰὼν οὐκ ἂν ἐξεύροιο πᾶσαν ἐπιπορευόμενος ὁδόν· οὕτω βαθὺν λόγον ἔχει → one would never discover the limits of soul, should one traverse every road—so deep a measure does it possess
English (LSJ)
[ῠ], ᾰκος, ὁ, A guard of an estate, PFay.113.4 (100 A.D.), PLond.2.189.20 (ii A. D.), etc.