thwart
v.v. to stop someone from doing what they planned or to prevent something from happening. You use this when a person or a problem gets in the way of a goal.
v. to prevent someone from accomplishing a purpose or to frustrate a plan or effort. Transitive; requires a direct object representing the goal or the person attempting it.
The heavy rain will thwart our plans for a picnic.
Security guards managed to thwart the robbery attempt before the suspects could reach the vault.
The diplomat's efforts to secure a lasting peace were repeatedly thwarted by deep-seated historical animosities and a lack of trust between the negotiating parties.
From Middle English thwerte, from the adjective thwert (“obstinate, perverse”), from Old Norse þvert, neuter of þverr (“transverse”). Cognates The English adjective is cognate with Danish tvær (“sullen, sulky”), Gothic 𐌸𐍅𐌰𐌹𐍂𐌷𐍃 (þwairhs, “angry”), Middle Dutch dwers, dwars (modern Dutch dwars (“crosswise, transverse; slantwise, askew; stubbornly disobedient”)), Norwegian tvert, tvært, Old Frisian þweres, dwers (Saterland Frisian twars, West Frisian dwers, dwerz (“across, to the other side of; beyond”)), Middle Low German dwers, dwars (Low German dwars (“contrary; cross-grained”)), Old English þweorh (“transverse; perverse; angry, cross”), Old High German twer (Middle High German twer, quer, modern German quer (“crosswise; cross”)), Swedish tvär (“across, transverse; of a curve: sharp; immediate, sudden; grumpy, stubborn”). It is related to queer; also Proto-West Germanic *þwerh,
The verb is transitive and takes a direct object.