εἰσβάλλειν

From LSJ

βάκτρῳ δ' ἐρείδου περιφερῆ στίβον χθονός → support with a staff your steps that waver on the ground

Source

Greek > English (Woodhouse Verbs Reversed)

(see also εἰσβάλλω): attack, enter, break into, cast in, fling into, go into, make an incursion, throw in, throw into