'Mischievous' in the Bible

Is there injustice on my tongue? Can't my taste discern mischievous things?

They also who seek after my life lay snares. Those who seek my hurt speak mischievous things, and meditate deceits all day long.

An evildoer heeds wicked lips. A liar gives ear to a mischievous tongue.

The beginning of the words of his mouth is foolishness; and the end of his talk is mischievous madness.