- engage in plotting or enter into a conspiracy, swear together
"They conspired to overthrow the government"

- arrange by systematic planning and united effort
"machinate a plot"
"organize a strike"
"devise a plan to take over the director''s office"

1. To plan; to contrive; esp., to form a scheme with the purpose of doing harm; to contrive artfully; to plot. "How long will you machinate!" Sandys.

1. To contrive, as a plot; to plot; as, to machinate evil.