instinctual
adjective /ɪnˈstɪŋktʃuəl/
  /ɪnˈstɪŋktʃuəl/
(biology or psychology)- based on instinct (= a natural quality that makes somebody/something behave in a particular way); not learnedOxford Collocations DictionaryInstinctual is used with these nouns:- drive
- impulse