Unemployment leads to a sense of uselessness, to say nothing of financial problems.失业会让人觉得自己一无是处，更何况还会带来经济问题。I had it on the tip of my tongue to ask him why he left home, but the uselessness of it was apparent.我差点问他为什么离家，但显然问也无用。The car had rusted almost to the point of uselessness.这车已经锈得几乎一点用都没有了。