单词	ultraquiet
释义	ultraquiet adjective ul·​tra·​qui·​et ˌəl-trə-ˈkwī-ət  : producing significantly less sound than is usual or expected : extremely or extraordinarily quiet ultraquiet engines Word History First Known Use 1863, in the meaning defined above ultraquiet adjective as in quiet Synonyms & Similar Words Relevance quiet tranquil peaceful calm serene restful silent arcadian placid noiseless hushed still gentle soft dull motionless quiescent low soundless stilly muffled mute muted dead wordless quieted speechless Antonyms & Near Antonyms noisy loud boisterous deafening rowdy raucous clattery roistering tumultuous wooly clamorous woolly wild romping uproarious unquiet crazy tempestuous rip-roaring earsplitting booming thunderous blasting piercing roaring thundering blaring See More
随便看	fault trough fault valley fault vent fault zone fault-line scarp fault-line valley fault-tolerant faultage faulted faulter faultfinder faultfinders faultfinding faultfindings faultful faultfully faultier faultiest faultilier faultiliest faultily faultiness faultinesses faulting faultless

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