verb (v)

• extract the essence of something by boiling it(verb.change)

  source: wordnet30
• be cooked until very little liquid is left(verb.change)

  Synonym:
  boil down, concentrate, reduce
  

  source: wordnet30
• steep in hot water(verb.change)

  source: wordnet30
• To prepare by boiling; to digest in hot or boiling water; to extract the strength or flavor of by boiling; to make an infusion of.(verb)

  source: webster1913