shuǐ​xiè​bù​tōng

impenetrable

水泄不通 (水洩不通) shuǐ​xiè​bù​tōng
impenetrable idiom
extremely crowded or congested by people or vehicles, making passage impossible
watertight idiom
so tightly sealed or blocked that not even a single drop of water can trickle through

Frequency

Movie subtitles
0.240 per million appears in 0% of films
Written text
1.76 per million

Sources

Definitions
CC-CEDICT