shiftiness

Her shiftiness during negotiations cost her the deal.

交渉中の彼女のずるさが取引を失わせた。

The shiftiness in his eyes made me suspicious of his motives.

彼の目のずるさが私に彼の動機を疑わせた。

The used car salesman had a shifty look about him.

その中古車販売員はずるそうな様子だった。

Don't trust him; he's known for being shifty in business deals.

彼を信用するな。彼は商取引でずるいことで知られている。