skullduggery

noun2

1. •
   A devious device or trick.

   • And you, O student, might do worse than to investigate the assorted sculduggeries of this obscure trio: […] — 1941
2. •
   Dishonest, underhanded, or unscrupulous activities or behaviour.

   • How did Hercules (Herc. of antiquity) slay the Hydrant and cleanse the stables of Oregon? Did it all by main force, didn't he? Power? Shenanigan? Skulduggery? Of course he did. — 1867