IPA: /ˌæbəˈrɪdʒənəli/
KK: /ˌæbəˈrɪdʒənəli/
In a way that relates to the original inhabitants of a place, especially in reference to their culture or traditions.
The land was aboriginally inhabited by various tribes long before colonization.
Aboriginally is formed from "aborigines" (from Latin "aborigines", meaning original inhabitants) and the suffix "-ally" (meaning in a manner relating to). The word refers to something that relates to the original inhabitants or the earliest known inhabitants of a place.
Think of 'aborigines' as the original people of a land, and '-ally' means in a manner related to them — so aboriginally refers to something that relates to those original inhabitants.