Webster's Revised Unabridged Dictionary · 1913

Machinate

Machinate , intransitive verb

[Latin machinatus, past participle of machinari to devise, plot. See Machine.]

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

Machinate , transitive verb

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