Futile

имя прилагательное 1) бесполезный, напрасный, тщетный Например: It's futile to speculate about what might have been. — Бессмысленно рассуждать о том, что могло произойти. Синоним(ы): useless, unavailing 2) несерьёзный, поверхностный, пустой, пустячный Синоним(ы): superficial, shallow

Большой англо-русский словарь

Futile

безрезультатный

Англо-русский научно-технический словарь

Futile

adjective Etymology: Middle French or Latin; Middle French, from Latin futilis brittle, pointless, probably from fu- (akin to fundere to pour) — more at found 1. serving no useful purpose ; completely ineffective
Example: efforts to convince him were futile 2. occupied with trifles ; frivolousfutilely adverbfutileness noun Synonyms: futile, vain, fruitless mean producing no result. futile may connote completeness of failure or unwisdom of undertaking
Example: resistance had proved so futile that surrender was the only choice left. vain usually implies simple failure to achieve a desired result
Example: a vain attempt to get the car started. fruitless comes close to vain but often suggests long and arduous effort or severe disappointment
Example: fruitless efforts to obtain a lasting peace.

Энциклопедический словарь Мерриама-Вебстера