impregnable¹

KK: [ɪmˈprɛɡnǝbḷ] DJ: [imˈprеɡnǝbl]

a.[(+to)]

攻不破的，難以攻陷的；堅不可摧的
an impregnable fortress
堅不可摧的要塞
堅強不屈的；不可動搖的；堅定不移的
They are virtually impregnable to attack from any other party.
其他黨派簡直無法攻倒他們。

ad.

impregnably

n. [U]

impregnability

同義:

a.堅固的

impregnable²

KK: [ɪmˈprɛɡnǝbḷ] DJ: [imˈprеɡnǝbl]

a.

以上來源於：《英漢大辭典》

adj.

unable to be captured or broken into.

▸unable to be overcome.

以上來源於：《簡明牛津英語詞典》