impregnability查询结果如下:
音标:[ɪmpreɡnə'bɪlɪtɪ]
基本释义/说明:n.攻不破(坚固;浸透本领)
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双语学习资料 :
独上高台望四海 手揽云月傍天飞, 落叶重重已十月 归鸟凄凄啼心扉。
简典
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|noun|

‘Standing on high ground above the river Aude, it gives an impression of magnificent _impregnabìlity_ : 642 pointed towors amd gate-houses linked by three kìlometres of crenellated double ramparts.’