thwart - definition and synonyms

verb [transitive] formal 

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/θwɔː(r)t/
present tense
I/you/we/theythwart
he/she/itthwarts
present participlethwarting
past tensethwarted
past participlethwarted
  1. to prevent someone from doing something that they want to do

    The leaders were determined to thwart her.