'Vanity' in the Bible

So am I made to possess months of vanity, and wearisome nights are appointed to me.

I loathe it; I would not live alway: let me alone; for my days are vanity.

Let not him that is deceived trust in vanity: for vanity shall be his recompence.

They conceive mischief, and bring forth vanity, and their belly prepareth deceit.

If I have walked with vanity, or if my foot hath hasted to deceit;

Surely God will not hear vanity, neither will the Almighty regard it.