Rootsnoun
Ancestry.
Rootsnoun
Beginnings; origin.
Rootsnoun
the condition of belonging to a particular place or group by virtue of social or ethnic or cultural lineage;
Zeroesnoun
plural of zero
Zeroesnoun
(rare) The decade of the 1800s, 1900s, 2000s, etc. The noughties. The 2000s.