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Adjective: decayed  di'keyd
  1. Damaged by decay; hence unsound and useless
    "a decayed foundation";
    - rotten, rotted
Verb: decay  di'key
  1. (physics) lose a stored charge, magnetic flux, or current
    "the particles decayed during the nuclear fission process";
    - disintegrate, decompose
  2. Fall into decay or ruin
    "The unoccupied house started to decay";
    - crumble, dilapidate
  3. Undergo decay or decomposition
    "The body started to decay and needed to be cremated"

See also: unsound

Type of: change, change integrity

Encyclopedia: Decayed, missing, and filled teeth

Decay, radioactive