单词	ultraefficient
释义	ultraefficient adjective ul·​tra·​ef·​fi·​cient ˌəl-trə-i-ˈfi-shənt  : producing desired effects with very little or no waste an ultraefficient engine Word History First Known Use 1890, in the meaning defined above ultraefficient adjective as in efficient Synonyms & Similar Words Relevance efficient adequate hyperefficient capable operative effective efficacious competent effectual fruitful experienced veteran proficient productive adept virtuoso skilled killer expert skillful dynamic valid masterly accomplished practised striking practiced convincing cogent sound active practical feasible telling potent consummate working versed useful usable useable applicable workable functional realizable practicable Antonyms & Near Antonyms ineffective inefficient useless ineffectual incapable inoperative counterproductive unproductive fruitless incompetent vain unskilled abortive futile unfruitful unqualified unsuccessful inexperienced empty worthless hollow idle unprofitable pointless unskillful inoperative bootless inexpert unavailing unseasoned See More
随便看	not called for not care a fig not care/give a fig not come amiss not come/go amiss not content not contents not cost a dime not cost a nickel not cost a penny not cricket not dissimilar not do not do much for not dream of not especially not even blink not exactly not fool about not fool around not for (someone) to (do something) not for a minute not for a moment not for a/one minute not for a/one moment

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