decaying
de-cay-ing
verb
Undergoing a process of gradual destruction, decomposition, or deterioration over time.
"The old house was decaying due to neglect."
adjective
In the process of rotting, decomposing, or gradually deteriorating from a sound state.
"We found some decaying leaves in the garden."
Thesaurus
Synonyms: radioactive decay, disintegration, decay, crumble, dilapidate, decomposition, disintegrate, decompose, decline