futile adj.
VERBS be, prove, seem | consider sth, describe sth as The president described these activities as futile.
ADV. absolutely, completely, quite, totally, utterly an utterly futile struggle for justice | largely, rather | apparently, seemingly | ultimately Their attempts were impressive but ultimately futile.
You can also check other dicts: futile (English, 中文解释 ), wordnet sense, Collins Definition