dissimilation

Noun

• breakdown in living organisms of more complex substances into simpler ones together with release of energy

• a linguistic process by which one of two similar sounds in a word becomes less like the other
  • the Old French MARBRE became the English MARBLE by dissimilation
    

Related words

• Synonyms: 
  catabolism , katabolism , destructive metabolism
• Antonyms: 
  anabolism , constructive metabolism