In a way that relates to or is characteristic of the original inhabitants of a region; in terms of aboriginal status or nature.
From 'aboriginal' plus the adverbial suffix '-ly,' which transforms the adjective into an adverb describing how something occurs or the manner in which it is done.
English lets us stack suffixes to create new shades of meaning—'aboriginal' became 'aboriginality' (the noun-ness), then 'aboriginally' (the adverb-ness), showing how one root idea branches into different grammatical flavors.
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