complication

 
Pronunciation: /kɒmplɪˈkeɪʃ(ə)n/

noun

  • 1a circumstance that complicates something; a difficulty: there is a complication concerning ownership of the site
  • [mass noun] an involved or confused condition or state: to add further complication, English-speakers use a different name
  • 2 Medicine a secondary disease or condition aggravating an already existing one: she developed complications after the surgery

Origin:

late Middle English: from late Latin complicatio(n-), from Latin complicare 'fold together' (see complicate)