/ˈfjuːtaɪl/
having no purpose because there is no chance of success 徒然的；徒劳的；无效的 SYN pointless
a futile attempt/exercise/gesture
徒然的尝试／练习／表示
Their efforts to revive him were futile.
他们努力使他苏醒，但失败了。
It would be futile to protest.
抗议也无用。
My appeal proved futile.
我的申诉白费了。