decay - noun

the process of gradually becoming inferior

a gradual decrease; as of stored charge or current

the organic phenomenon of rotting

an inferior state resulting from the process of decaying

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

decay - verb

• lose a stored charge, magnetic flux, or current
• fall into decay or ruin
• undergo decay or decomposition

decay - thesaurus

crumble   decline   decompose   decomposition   dilapidate   disintegrate   disintegration