at·a·vis·tic
adjective/ˌætəˈvɪstɪk/
/ˌætəˈvɪstɪk/
(formal)- related to the feelings, attitudes and behaviour of humans in ancient times that have been passed on to modern humans as a habit or instinct
返祖的；原始的 - an atavistic urge/instinct/fear
返祖倾向／本能；原始畏惧
Word Originlate 19th cent.: based on Latin atavus ‘forefather’ + the adjectival suffix -istic. - an atavistic urge/instinct/fear