'Subtlety' in the Bible

Now therefore call unto me all the prophets of Baal, all his worshippers, and all his priests; let none be wanting: for I have a great sacrifice to do to Baal; whosoever shall be wanting, he shall not live. But Jehu did it in subtlety, to the intent that he might destroy the worshippers of Baal.

and took counsel together in order that they might seize Jesus by subtlety and kill him;

Now the passover and the feast of unleavened bread was after two days. And the chief priests and the scribes were seeking how they might seize him by subtlety and kill him.