Simple past tense and past participle of foreswear.(verb)
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Use "foresworn" in a sentence
"Of course, after all that, you would think outwardly progressive organizations would have learned their lesson and foresworn the whole lions-and-lambs, utopianism-as-pragmatism approach to climate policy, right?"
"I am sure you will find practitioners who have foresworn health insurance for this reason."
"She is a judge who has foresworn judicial activism in her confirmation hearings, but who has a long record of it prior to 2009."