conniving
adj/kəˈnaɪvɪŋ/
1
That connives; conspiratorial.
- I waited. Then those two / Strange pilgrims of the sanctuaries of sin / Brought from beneath their large conniving cloaks / Two hidden baskets brimming with rich store / Of broken viands — pasties, jellies, meats, / Crumbs of Belshazzar's table, evil waste / Of that interminable nightly feast […]1902, Edith Wharton, The Bread of Angels: