'Subtle' in the Bible

Now the serpent was more subtle than any beast of the field which Jehovah God had made. And he said unto the woman, Yea, hath God said, Ye shall not eat of any tree of the garden?

But Amnon had a friend, whose name was Jonadab, the son of Shimeah, David's brother; and Jonadab was a very subtle man.

And behold, there met him a woman in the attire of a harlot, and subtle of heart.