To prevent from accomplishing a purpose
Situated or lying across
No one, said his younger brother Lucien, liked to thwart him.
I would ask that you bestow defenses upon them to thwart his inevitable attack.
But a conqueror came who had no empresses to thwart him.
professing to have taken umbrage at Sarpi's extensive correspondence with learned heretics, but more probably determined to thwart the desires of the liberal rulers of Venice.
The legislature of 1863 and the state officers were opposed to him politically, and did everything in their power to thwart him and deprive him of his control of the militia.