腐朽

HSK 7-9

fǔxiǔ

corrupt; rotten; decayed

decayed; decadent; degenerate

树木腐朽

shù mù fǔ xiǔ

The trees are rotten

他的思想已经腐朽了

tā de suàn xiǎng yǐ jīng fǔ xiǔ le

His ideas have become outdated