anti- - definition and synonyms

prefix 

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/ænti/
  1. 1
    opposed to someone or something: used with many nouns and adjectives

    antiwar protesters

     Synonyms and related words
  2. 2
    with the opposite qualities or effects: used with some nouns and adjectives
     Synonyms and related words
  3. 3
    preventing or curing something: used with some nouns and adjectives

    an anti-tetanus injection

     Synonyms and related words