4350  proskopto  pros-kop'-
to

 from 4314 and 2875; to 
strike at, i.e. surge against 
(as water); specially, to 
stub on, i.e. trip up 
(literally or figuratively):-
-beat upon, dash, stumble 
(at).

 see GREEK for 4314

 see GREEK for 2875