Simple past tense and past participle of thwart.(verb)
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Use "thwarted" in a sentence
"The following year, Garcia took a one-stroke lead to the 70th hole of the PGA Championship but Harrington again thwarted Garcia's bid to break into the fraternity of major champions."
"To be curbed, stood up to, in a word thwarted, exercises the character, elasticates the spirit, makes it pliant."
"The pull of a mystery that needs to be solved, or of an unseen and looming threat that needs to be thwarted is alluring for many readers, and for me, combining that with either an epic, urban or alternative fantasy setting is better than ice cream and cake."