HSK 7-9
腐蚀
fǔshí动
corrosion; to corrode (degrade chemically); to rot; corruption
海风不断腐蚀码头铁栏。
Hǎi fēng bú duàn fǔ shí mǎ tóu tiě lán.
Sea winds continuously corrode the iron railing at the pier.
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Appears across levels (7-9) in the HSK 3.0 word list.