ἀστιβής
From LSJ
τὴν οἴησιν ἔλεγε προκοπῆς ἐγκοπήν → he used to say, Opinion forming is the stoppage of progress
English (LSJ)
ές, (στείβω)
A untrodden, τινί A.Th.859 (lyr.): hence, 2 desert, pathless, χῶρος S.Aj.657; ἀ. πόρος, of the sea, Arion 1.16; ὁδός Hymn.Is.149. 3 not to be trodden, holy, ἄλσος S.OC126; rare in Prose, as X.Mem.3.8.10. II Act., leaving no track, τροχός Mesom.Nem.7.