decay
noun
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the organic phenomenon of rottingdecomposition
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a gradual decreasedecline
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the process of gradually becoming inferior
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the spontaneous disintegration of a radioactive substance along with the emission of ionizing radiationdisintegration
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an inferior state resulting from the process of decaying“the corpse was in an advanced state of decay”
verb
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fall into decay or ruin“The unoccupied house started to decay”crumbledilapidate
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lose a stored charge, magnetic flux, or currentdecomposedisintegrate
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undergo decay or decomposition“The body started to decay and needed to be cremated”