| 例句 |
unprofitableadjective producing no resultsan unprofitable effort to find the information abortive, barren, bootless, empty, fruitless, futile, ineffective, ineffectual, inefficacious, otiose, profitless, unavailing, unproductive, unsuccessful, useless, vain hollow, idle, meaningless, pointless, valueless, worthlesshopeless, impossible, lost, no-win, unattainableinadequate, insufficient, lacking, wantingcounterproductive in vain, no dice, not worth the candle, of no avail deadly, effective, effectual, efficacious, efficient, fruitful, potent, productive, profitable, successful, virtuous meaningful, worthwhileadequate, sufficientapplicable, feasible, functional, practicable, practical, realizable, usable(also useable), workable in the 14th century |