A: Atavism: Wear Your Dictionary: English: Katakana: Transliteration: Pronunciation: Version I

 Atavism [アタビズム] - The recurrence or reversion to a past behaviour, method, characteristic or style after a long period of absence. https://en.wiktionary.org/wiki/atavism 

Wiktionary contributors, "atavism," Wiktionary, The Free Dictionary, https://en.wiktionary.org/w/index.php?title=atavism&oldid=58255702 (accessed October 4, 2020).