Simple past tense and past participle of invigilate.(verb)
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Use "invigilated" in a sentence
"Those of us who have for years invigilated (officially and unofficially in retirement) watched and warned of the ravages of Marxism and its modified covert by-products must continue to rally to Melanie's support."
"I know the Wiki is interactive an that it is invigilated so perhaps it was a smear that was detected and deleted."
"Cosas was also dissatisfied with the exams monitoring system, where teachers invigilated their own school's pupils rather than teachers from outside."