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Verb: rarefy  'reh-ru,fI
  1. Lessen the density or solidity of
    "The bones are rarefied";
    - rarify [rare]
  2. Make more subtle or refined
    - sublimate, subtilize, rarify [rare], subtilise [Brit]
  3. (chemistry) weaken the consistency of (a chemical substance)
    - attenuate, rarify [rare]
  4. Make more complex, intricate, or rich
    - complicate, refine, rarify [rare], elaborate

Derived forms: rarefying, rarefies, rarefied

Type of: alter, change, modify, weaken

Encyclopedia: Rarefy