to contrive or plot, especially artfully or with evil purpose: to machinate the overthrow of the government.
…his malevolent memory would machinate on [it], until the day the darkness he so passionately believed in but just as passionately tried to avoid finally descended. — Michael Walsh, Early Warning, 2010
You do not think I am intelligent enough to scheme? Then I haven’t the wits necessary to machinate? — Connie Brockway, So Enchanting, 2009
Machinate entered English from the Latin machina in the first half of the fifteenth century.