verb (v)

• cause to ripen or develop fully(verb.change)

  Example:
  The sun ripens the fruit.
  

  Synonym:
  mature
  

  source: wordnet30
• grow ripe(verb.change)

  Example:
  The plums ripen in July.
  

  source: wordnet30
• To grow ripe; to become mature, as grain, fruit, flowers, and the like; as, grapes ripen in the sun.(verb)

  source: webster1913
• To cause to mature; to make ripe; as, the warm days ripened the corn.(verb)

  source: webster1913