'Empty' in the Bible

Why are the nations in an uproar [in turmoil against God],And why do the people devise a vain and hopeless plot?

And when one comes to see me, he speaks empty words,While his heart gathers malicious gossip [against me];When he goes away, he tells it [everywhere].

The Lord knows the thoughts of man,That they are a mere breath (vain, empty, futile).