affinity - definition and synonyms

noun 

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/əˈfɪnəti/
singularaffinity
pluralaffinities
  1. 1
    [singular] a natural understanding and sympathy between people

    There’s an affinity between the twins that’s very rare.

    1. a.
      a natural understanding of something

      She has a distinct affinity for music.

  2. 2
    [countable/uncountable] a connection between two or more similar things