/ θwɔːt; NAmE θwɔːrt/ verb
[ vn ] [ often passive ] thwart sth | thwart sb (in sth) to prevent sb from doing what they want to do
SYN frustrate :
to thwart sb's plans
She was thwarted in her attempt to take control of the party.
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WORD ORIGIN
Middle English thwerte , from the adjective thwert perverse, obstinate, adverse , from Old Norse thvert , neuter of thverr transverse, from an Indo-European root shared by Latin torquere to twist.