1. Noun, Suru verb, Intransitive verb, Noun which may take the genitive case particle 'no', Na-adjective (keiyodoshi)

   1.

   opposition; resistance; antagonism; hostility

2. Noun, Noun which may take the genitive case particle 'no'

   2.

   reverse; opposite; inverse; contrary

Example sentences

• 結婚に反対です。

  I'm against marriage.

• 戦争に反対です。

  I'm against the war.