" inborn "

1: being a part of the innermost nature of a person or thing;

  * e.g., " ... an inborn talent for dancing "

•  Synonyms : 

•  built-in,

•  constitutional,

•  constitutive,

•  essential,

•  hardwired,

•  immanent,

•  inbred,

•  indigenous,

•  ingrain,

•  ingrained,

•  inherent,

•  innate,

•  integral,

•  intrinsic,

•  native,

•  natural

•  Antonyms : 

•  adventitious,

•  extraneous,

•  extrinsic

2: genetically passed or capable of being passed from parent to offspring;

  * e.g., " ... certain instincts are inborn in mice "

•  Synonyms : 

•  genetic,

•  hereditary,

•  heritable,

•  inheritable,

•  inherited

•  Antonyms : 

•  nonhereditary