fǔ xiǔ
rotten
decayed
decadent
degenerate
yǒng chuí bù xiǔ
eternal glory
will never be forgotten
shuāi xiǔ
decaying
decrepit
aged and crumbling
xiǔ dù
to decay and be eaten by worms etc
to over-hoard grain so that it rots
huà fǔ xiǔ wéi shén qí
lit. to change something rotten into something magical (idiom)