πολλὰ δ' ἄναντα κάταντα πάραντά τε δόχμιά τ' ἦλθον → and ever upward, downward, sideward, and aslant they went
sŭb-ĕdo: ēdi, 3, v. a.,
I to eat, waste, or wear away below: e scopulo, quem rauca subederat unda, Ov. M. 11, 783; Hier. in Jer. 1, 2, 37.
sŭbĕdō,¹⁶ ēdī, ĕre, tr., ronger par-dessous, miner : Ov. M. 11, 783.