decay
noun
the process of gradually becoming inferior
a gradual decrease; as of stored charge or current
Synonymsdeclinethe organic phenomenon of rotting
Synonymsdecompositionan inferior state resulting from the process of decaying
“the corpse was in an advanced state of decay”
“the house had fallen into a serious state of decay and disrepair”
the spontaneous disintegration of a radioactive substance along with the emission of ionizing radiation
verb
lose a stored charge, magnetic flux, or current
“the particles disintegrated during the nuclear fission process”
fall into decay or ruin
“The unoccupied house started to decay”
undergo decay or decomposition
“The body started to decay and needed to be cremated”
Source: WordNet 3.1, Princeton University
