underhandedly

“He needs to dominate, and he does it underhandedly,” Parker says.

They declare themselves neutral, but they help the Dutch underhandedly on all occasions.

Britain would assist the Algerines underhandedly, as she did an enemy in another quarter, and would continue to do so.

He knows who, in his own vicinity, still has specie in his pocket and he underhandedly supplies him with his stores.

They maneuver, skirmish, and negotiate underhandedly with the uncertain elements in the hostile camp.

Not taken by poison nor underhandedly, but torn out of your deceitful body as we stand face to face.