κατασείειν
From LSJ
δι' ἐρημίας πολεμίων πορευόμενος → he marched on without finding any enemy, his route lay through a country bare of enemies
Greek > English (Woodhouse Verbs Reversed)
(see also κατασείω): batter down, shake down
Lexicon Thucydideum
quassare, to shake, shatter, 2.76.4 (de machina concerning the engine).