'Useless' in the Bible

“For He recognizes and knows false and worthless men,And He sees wickedness, will He not consider it?

So will My word be which goes out of My mouth;It will not return to Me void (useless, without result),Without accomplishing what I desire,And without succeeding in the matter for which I sent it.

Israel is [as if] swallowed up [by enemies];They are now among the nationsLike a vessel [of cheap, coarse pottery] that is useless.

“Those who regard and follow worthless idolsTurn away from their [living source of] mercy and lovingkindness.

You have said, ‘It is useless to serve God. What profit is it if we keep His ordinances, and walk around like mourners before the Lord of hosts?