impregnable

[ɪmˈpregnəbl] [ɪmˈprɛɡnəbəl]
例句
同义词
柯林斯高阶英汉双解学习词典释义
英汉词典释义
英英词典释义
  • Adjective
    1. able to withstand attack;
    "an impregnable fortress""fortifications that made the frontier inviolable"
    2. impossible to take by storm