παρεισρέω
From LSJ
ὁδὸς ἄνω κάτω μία καὶ ὡυτή → the road up and the road down is one and the same, the upward path and the downward path are the same
English (LSJ)
A flow or stream in, [ὕδωρ] εἰς τὰς μυωπίας π. Thphr.Fr.174.7; glide or slip in, εἰς τὰ συσσίτια, εἰς τὴν πόλιν, Plu.Lyc.17,27 :—Pass., in lit. sense, ἐὰν παρεισρυῇ ὑγρὸν εἰς τὴν ἀρτηρίαν glide in by the side or imperceptibly, Arist.PA664b5, cf. Agathin. ap. Orib.10.7.28.
