Answer: decayed

AnswerCrossword Clue
DECAYEDSpoiled.
DECAYEDLess radioactive
DECAYEDTurned, and then some
DECAYEDRotted
DECAYEDProgressively declined
DECAYEDIn bad shape
decayedDECAY, to rot (to decompose)
decayeddecomposition
decayedgradual decline
decayedto decline in quality, health, etc.
decayedto rot