Impregnable
"Impregnable" in cmn
固若金湯 /固若金汤
gùruòjīntāng
(of a fortress or other fortified place: able to withstand all attacks — see also impenetrable, inconquerable, unvanquishable)
堅不可摧 /坚不可摧
jiānbùkěcuī
(of a fortress or other fortified place: able to withstand all attacks — see also impenetrable, inconquerable, unvanquishable)
險固 /险固
xiǎngù
(of a fortress or other fortified place: able to withstand all attacks — see also impenetrable, inconquerable, unvanquishable)
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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.