decay

the spontaneous disintegration of a radioactive substance along with the emission of ionizing radiation

the organic phenomenon of rotting

lose a stored charge, magnetic flux, or current

fall into decay or ruin

“The unoccupied house started to decay”

a gradual decrease; as of stored charge or current

an inferior state resulting from the process of decaying

“the corpse was in an advanced state of decay”

the process of gradually becoming inferior

undergo decay or decomposition

“The body started to decay and needed to be cremated”