in·cest /ˈɪnˌsɛst/
  近親相奸,亂倫
  in·cest /ˈɪnˌsɛst/ 名詞
  血族婚配,近親交配
  In·cest n.  The crime of cohabitation or sexual intercourse between persons related within the degrees wherein marriage is prohibited by law; broadly, sexual relations between closely related persons, usually taken as first cousins or closer.
  Spiritual incest. Eccl. Law (a) The crime of cohabitation committed between persons who have a spiritual alliance by means of baptism or confirmation. (b) The act of a vicar, or other beneficiary, who holds two benefices, the one depending on the collation of the other.
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  incest
       n : sexual intercourse between persons too closely related to
           marry (as between a parent and a child)