'Idle' in the Bible

We have heard of the pride of Moab, an excessive pride;Even of his arrogance, pride, and fury;His idle boasts are false.

who frustrates the omens of idle talkers, and drives diviners mad, who turns back the wise, and makes their knowledge foolish;

"If you keep your feet from trampling the Sabbath, from pursuing your own interests on my holy day, if you call the Sabbath a delight and the LORD's holy day honorable; and if you honor it by not going your own ways and seeking your own pleasure or speaking merely idle words,