noun (n)

• a symptom of reduced quality or strength

  sebuah gejala mengurangi kualiti atau kekuatan

  Synonym:
  impairment
  

  source: wordnet30
• process of changing to an inferior state

  proses mengubah keadaan kepada yang lebih rendah

  Synonym:
  declension, decline in quality, worsening
  

  source: wordnet30
• The process of growing worse, or the state of having grown worse.

  proses bertambah buruk, atau mengalami keadaan semakin buruk.

  source: webster1913