单词	inefficacious
释义	inefficacious adjective in·​ef·​fi·​ca·​cious (ˌ)i-ˌne-fə-ˈkā-shəs  : lacking the power to produce a desired effect : ineffective inefficaciously adverb inefficaciousness noun Synonyms counterproductive feckless hamstrung ineffective ineffectual inefficient inexpedient See all Synonyms & Antonyms Example Sentences his efforts to restore the neglected houseplant back to health were belated and sadly inefficacious an inefficacious medication for a rare form of tuberculosis Recent Examples on the Web Day — who grew up watching the spelling bee — came up with the concept of exploring the psyche of a winner with an ultimately inefficacious career in 2015 while at a UCB improv sketch-writing class. NBC News, 6 Oct. 2020 Word History First Known Use 1658, in the meaning defined above inefficacious adjective 1 as in unsuccessful not producing the desired result his efforts to restore the neglected houseplant back to health were belated and sadly inefficacious Synonyms & Similar Words Relevance unsuccessful inefficient counterproductive ineffective worthless inexpedient ineffectual unprofitable pointless feckless unavailing useless futile abortive profitless nonproductive fruitless unproductive bootless hamstrung Antonyms & Near Antonyms efficacious effective efficient effectual expedient beneficial operant successful useful worthwhile profitable helpful productive ultraefficient availing See More 2 as in futile producing no results an inefficacious medication for a rare form of tuberculosis Synonyms & Similar Words futile unsuccessful useless ineffective unavailing ineffectual unprofitable fruitless in vain abortive profitless insufficient unproductive worthless impossible vain inadequate otiose meaningless bootless barren valueless pointless empty lost not worth the candle of no avail hollow hopeless no dice lacking unattainable idle counterproductive no-win wanting Antonyms & Near Antonyms effective successful efficient efficacious profitable virtuous fruitful productive deadly potent effectual worthwhile sufficient adequate meaningful practical feasible applicable practicable workable functional usable realizable useable See More
随便看	lammergeyer lammergeyers lammermoor Lammermuir lammers lamming lammings Lamna lamnae lamnas Lamnidae lamnidaes lamnoid Lamona lamonas lamp lamp furnace lamp holder lamp oil lamp-iron lampad lampadaries lampadedromies lampadists lampadite

英语词典包含469781条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。