unfruitful not fruitful; not conducive to abundant production
impotent lacking power or ability; "Technology without morality is barbarous; morality without technology is impotent"- Freeman J.Dyson; "felt impotent rage"
unproductive not producing desired results; "the talks between labor and management were unproductive"
barren completely wanting or lacking; "writing barren of insight"; "young recruits destitute of experience"; "innocent of literary merit"; "the sentence was devoid of meaning"
