impregnableKK [ˏɪmˋprɛgnəbəl] /ˌɪmˈpɹɛɡnəbəl/發音形容詞1難以攻破的、固若金湯的The old castle sat on a cliff and looked completely impregnable.那座古堡建在懸崖上,看起來固若金湯。2無法駁倒的、無懈可擊的Her argument was impregnable, and no one dared to question it.她的論點無懈可擊,沒有人敢質疑。3不可動搖的、堅不可摧的The team built an impregnable lead in the second half.這支球隊在下半場建立了不可動搖的領先優勢。