| Main Entry: | |
| Part of Speech: | adjective |
| Definition: | never-ending |
| Synonyms: | amaranthine, constant, continual, continuous, day and night, endless, eternal, everlasting, incessant, indefatigable, interminable, nonstop, on a treadmill, perennial, perpetual, round the clock, unceasing, unending, uninterrupted, unremitting, untiring, world-without-end |
| Antonyms: | ceasing, completed, concluded, ending, finished, infrequent, irregular, occasional |
| Main Entry: | futile |
| Part of Speech: | adjective |
| Definition: | hopeless, pointless |
| Synonyms: | abortive, barren, bootless, delusive, empty, exhausted, forlorn, fruitless, hollow, idle, impracticable, impractical, in vain, ineffective, ineffectual, insufficient, no dice, nugatory, on a treadmill, otiose, out the window, profitless, resultless, save one's breath, sterile, to no avail, to no effect, to no purpose, trifling, trivial, unavailing, unimportant, unneeded, unproductive, unprofitable, unreal, unsatisfactory, unsubstantial, unsuccessful, useless, vain, valueless, worthless |
| Antonyms: | fruitful, hopeful, productive, profitable |
| Main Entry: | interminable |
| Part of Speech: | adjective |
| Definition: | infinite |
| Synonyms: | boring, boundless, ceaseless, constant, continuous, day-and-night, dragged out, dull, endless, eternal, everlasting, immeasurable, incessant, interminate, limitless, long, long-drawn-out, long-winded, looped, never-ending, no end of, no end to, on a treadmill, permanent, perpetual, protracted, spun out, strung out, timeless, unbound, unceasing, uninterrupted, unlimited, wearisome |
| Antonyms: | bounded, ending, finite, terminable |
| Main Entry: | unavailing |
| Part of Speech: | adjective |
| Definition: | futile |
| Synonyms: | barren, empty, exhausted, fruitless, idle, impractical, in vain, ineffective, ineffectual, on a treadmill, save one's breath, to no avail, to no effect, to no purpose, trifling, trivial, unproductive, unprofitable, unsuccessful, useless, vain, valueless, worthless |
| Main Entry: | vain |
| Part of Speech: | adjective |
| Definition: | futile, useless |
| Synonyms: | abortive, barren, bootless, delusive, delusory, empty, frivolous, fruitless, going nowhere, hollow, idle, in vicious circle, inefficacious, insignificant, misleading, no-win, not a prayer, nugatory, on a treadmill, otiose, paltry, petty, pointless, profitless, puny, senseless, shuck, slight, sterile, time-wasting, trifling, trivial, unavailing, unimportant, unnotable, unproductive, unprofitable, valueless, void, worthless |
| Antonyms: | possible |