καμψίπους
From LSJ
ἐβόα καὶ βαρβαρικῶς καὶ Ἑλληνικῶς → shouted out both in Persian and Greek, shouted out in the barbarian tongue and in Greek
English (LSJ)
ὁ, ἡ, πουν, τό, gen. ποδος,
A bending the foot, in running, i.e. swift-running, Ἐρινύς A.Th.791 (lyr.).