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Verb: subtilise  'sú-tu,lIz
Usage: Brit (N. Amer: subtilize)
  1. Make more subtle or refined
    "The philosopher subtilised the concept to its essence";
    - rarefy, sublimate, subtilize, rarify [rare]
     
  2. Mark fine distinctions and subtleties, as among words
    "The linguist subtilised the differences between synonyms";
    - subtilize
     
  3. Make (senses) more keen
    "Years of practice subtilised the chef's sense of taste";
    - subtilize

Derived forms: subtilising, subtilises, subtilised

Type of: alter, change, discriminate, heighten, know apart, modify, sharpen