'Futile' in the Bible

So am I allotted months of futility and suffering,And [long] nights of trouble and misery are appointed to me.

whose trust is in something futile, whose security is a spider's web.

“Is there no end to [your futile] words of wind?Or what plagues you [so much] that you [so boldly] answer [me like this]?

So how can you offer me such futile comfort?Your answers are deceptive.