English to English

verb (v)

• grind and knead(verb.contact)

  Example:
  Masticate rubber.
  

  source: wordnet30
• chew (food); to bite and grind with the teeth(verb.consumption)

  Synonym:
  chew, jaw, manducate
  

  source: wordnet30
• To grind or crush with, or as with, the teeth and prepare for swallowing and digestion; to chew; as, to masticate food.(verb)

  source: webster1913