NTUMC+ Open Multilingual Wordnet 0.9

不能攻占, 不动摇+的, 难攻陷, 坚定, 不动摇, 难攻陷, 不能驳倒, 不能驳倒, 无法攻取, 坚定+的, 难攻陷+的, 无法攻取, 不能攻占

impregnable, inexpugnable

incapable of being overcome, challenged or refuted

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