Past tense of 'brigue': engaged in secret plotting or political scheming.
From 'brigue' plus the regular past tense suffix '-ed.' This is the past participle form used to describe completed acts of intrigue.
This archaic verb form shows how English once had a specific word for the sneaky political games that were so common in courts—today we'd just say 'schemed' or 'conspired,' losing the sophisticated flavor of the original.
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