'Mischievous' in the Bible

For they intended evil against thee; they imagined a mischievous device, which they could not execute.

Rest in Jehovah, and wait patiently for him: fret not thyself because of him that prospereth in his way, because of the man that bringeth mischievous devices to pass.

And they that seek after my life lay snares for me; and they that seek my hurt speak mischievous things, and meditate deceits all the day long.

Thy tongue deviseth mischievous things, like a sharp razor, practising deceit.