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Verb: subtilise  'sú-tu,lIz
Usage: Brit (N. Amer: subtilize)
  1. Make (senses) more keen
    - subtilize
  2. Mark fine distinctions and subtleties, as among words
    - subtilize
  3. Make more subtle or refined
    - rarefy, sublimate, subtilize, rarify

Derived forms: subtilised, subtilises, subtilising

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