What are the antonyms for Watchwording?

• v.

  • countersign
  • contradict
  ,
  • deny
  ,
  • disallow
  ,
  • invalidate
  ,
  • reject
  ,
  • repudiate
  .

Organomercury compounds are a type of chemical that can be harmful to humans and the environment. However, their antonyms, such as organic compounds or non-toxic compounds, are les...