'Vain' in the Bible

“Let the stars of its early dawn be dark;Let the morning wait in vain for the light,Let it not see the eyelids of morning (the day’s dawning),

“The caravans of Tema looked [for water],The caravans of Sheba waited for them [in vain].

If I be wicked, why then labour I in vain?

For he knoweth vain men: he seeth wickedness also; will he not then consider it?

For vain man would be wise, though man be born like a wild ass's colt.

“But the eyes of the wicked will fail,And they will not escape [the justice of God];And their hope is to breathe their last [and die].”

Should a wise man utter vain knowledge, and fill his belly with the east wind?

Shall vain words have an end? or what emboldeneth thee that thou answerest?

How then comfort ye me in vain, seeing in your answers there remaineth falsehood?

Behold, all ye yourselves have seen it; why then are ye thus altogether vain?

“If I have withheld from the poor what they desired,Or have caused the eyes of the widow to look in vain [for relief],

“Surely God will not listen to an empty cry [which lacks trust],Nor will the Almighty regard it.

Therefore doth Job open his mouth in vain; he multiplieth words without knowledge.

She is hardened against her young ones, as though they were not hers: her labour is in vain without fear;

Behold, the hope of him is in vain: shall not one be cast down even at the sight of him?