verb (v)

• to make better(verb.change)

  Synonym:
  amend, better, improve, meliorate
  Antonym:
  aggravate, exacerbate, exasperate, worsen
  

  source: wordnet30
• get better(verb.change)

  Synonym:
  better, improve, meliorate
  Antonym:
  decline, worsen
  

  source: wordnet30
• To make better; to improve; to meliorate.(verb)

  source: webster1913
• To grow better; to meliorate; as, wine ameliorates by age.(verb)

  source: webster1913