Etymology
From Latin magnopere (“exceedingly, greatly; earnestly, vehemently”) + -ate (verb-forming suffix), modelled after operate, further from the univerbation of magnō (ablative neuter singular of magnus (“big, large; (figuratively) great, important”)) + opere (ablative singular of opus (“labour, toil, accomplishment, work; work (of art, literature, etc.)”)), literally “with great zeal, effort, work done”, ultimately from the roots of Proto-Indo-European *méǵh₂s (“big, great”)) and Proto-Indo-European *h₃ep- (“to toil, work; to make; ability; force”)).