FUTILE

(UNSUCCESSFUL) [adjective] - (of actions) having no effect or achieving nothing; unsuccessfulAttempts to get supplies to the region are futile because troops will not allow the aid convoy to enter the city.It's quite futile trying to reason with him - he just won't listen.All my attempts to cheer her up proved futile.It is hoped that the leaders will consider the matter deeply before they embark on a long, bloody and futile war.