noun (n)

• the act of imposing something (as a tax or an embargo)(noun.act)

  Synonym:
  infliction
  

  source: wordnet30
• an uncalled-for burden(noun.cognition)

  Example:
  He listened but resented the imposition.
  

  source: wordnet30
• The act of imposing, laying on, affixing, enjoining, inflicting, obtruding, and the like.(noun)

  source: webster1913