rarefy

Verb
  1. Lessen the density or solidity of (synset 200571460)
    "The bones are rarefied"
    is a type of: alter, change, modify - cause to change; make different; cause a transformation
  2. Make more subtle or refined (synset 200553215)
    is a type of: alter, change, modify - cause to change; make different; cause a transformation
    same as: sublimate, subtilize
  3. Weaken the consistency of (a chemical substance) (synset 200226805)
    referred to in: chemical science, chemistry - the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions
    is a type of: weaken - lessen the strength of
    same as: attenuate

Other Searches