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TOEFL IELTS BNC: 4667 COCA: 5657
useless adj.
⇨ useless (useless to protest) ⇨ incompetent (useless at French) useless

adjective

useless ♦︎ in vain ♦︎ pointless ♦︎ futile ♦︎ hopeless ♦︎ fruitless ♦︎ vain ♦︎ unusableThese words all describe sth which has no purpose or does not achieve what you want. 这些词均表示无用的、无效的、徒劳的。PATTERNS AND COLLOCATIONS 句型和搭配◆to be useless / pointless / futile / hopeless / fruitless / vain to do sth◆to be useless / pointless doing sth◆a useless / pointless / futile / fruitless exercise◆a futile / hopeless / fruitless / vain attempt◆a futile / fruitless / vain effort◆a hopeless / fruitless / vain task◆a futile / hopeless / fruitless / vain search◆largely useless / in vain / pointless / futile / hopeless / fruitless / vain◆seemingly useless / in vain / pointless / futile / hopeless◆completely useless / pointless / futile / hopeless / unusable◆utterly useless / pointless / futile / hopeless■ useless not useful; not doing or achieving what is needed or wanted 无用的；无效的；无价值的◆This pen is useless.这支笔没用了。◆He knew it was useless to protest.他知道抗议是徒劳的。◆It's useless worrying about it.为这事担心无济于事。◆The letter is useless as evidence.这封信作为证据毫无价值。◆The land is useless for cattle.这块地根本不能用来牧牛。◆The drug is useless in the treatment of patients with AIDS.这种药对治疗艾滋病人无效。◆The information was useless to him.这条信息对他来说没有价值。◆The quality ranged from acceptable to worse than useless.质量从尚可到非常糟糕不等。OPP useful ⇨ useful , valuable ⇨ valuable 2 ▸ uselessly

adverb

◆The sail flapped uselessly.帆摆动着，却不起作用。■ in ˈvain

idiom

 (written) not achieving what is needed or wanted; without success 徒劳无功；白费力气◆All their efforts were in vain.他们的所有努力都付诸东流了。◆They tried in vain to persuade her to go.他们极力劝说她去，但枉费了一番口舌。◆She waited in vain for her son to return.她等着儿子归来，但空等了一场。■ pointless having no purpose; not worth doing because there is no hope of success 无意义的；无目标的；不值得做的◆Trying to foresee the future is a pointless exercise.试图预测未来是毫无意义的事。◆It would be pointless for both of you to work on the same thing.你们俩做同一件事是毫无意义的。◆I knew it was pointless expecting him to change his mind.我知道指望他改变主意是徒劳的。OPP worthwhile ⇨ valuable 2 ▸ pointlessly

adverb

◆He would argue pointlessly with his parents.他会无谓地和父母争论。■ futile ˈfjuːtaɪl; NAmE ˈfjuːtl (rather formal) ending in failure; having no effect or purpose 徒然的；徒劳的；无效的◆It was a futile gesture as the real damage had already been done.都已经造成真正的伤害了，做出那种姿态也是枉然。◆Their efforts to revive him were futile.他们努力使他苏醒，但失败了。▸ futility fjuːˈtɪləti

noun

 [uncountable] ◆a sense of futility徒劳感◆the futility of war战争的徒然无益■ hopeless with no hope of success, improvement or of producing useful results 没有成功（或改善）希望的；无望的◆It's hopeless trying to convince her.想说服她简直是徒劳。◆Most students are making good progress, but Michael is a hopeless case.大多数学生都很有进步，唯有迈克尔不可救药。OPP hopeful ⇨ promising ■ fruitless (rather formal) producing no useful results 没有成果的；无成效的；徒然的◆He returned home after weeks of fruitless negotiations.他在进行了数星期毫无成果的谈判后回家了。◆The search proved fruitless.搜查最后只是徒劳。OPP fruitful ⇨ productive ■ vain [usually before noun] (written) not producing the result you want 徒劳的；枉然的；无结果的◆I knocked loudly in the vain hope that someone might answer.我敲门敲得很响，希望有人应声，却是徒然。■ unusable ˌʌnˈjuːzəbl [not usually before noun] in such a bad condition or of such low quality that it cannot be used （破得或差得）不能使用，破烂不堪◆The damage rendered the building unusable.这次破坏使得这栋建筑已无法使用。◆The plutonium is unusable for anything until it is reprocessed.钚这种物质需要经过处理后方可使用。OPP usable ⇨ useful

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