Where does “incuriosus” come from?

incuriosus (Latin) comes from Latin incuria, from Latin īn-, from Latin în, from Latin en, from Proto-Italic en, from Proto-Indo-European h₁én — in.

incuriosus (Latin): careless, negligent; indifferent, unconcerned;...

Definitions

incuriosus traces back through two separate lines of ancestry.

Step	Language	Word	Meaning
1	Latin	incuria	lack of care, carelessness, negligence, neglect
2	Latin	īn-	un-, non-, not
3	Latin	în	in, at, on, upon, from (space)
4	Latin	en	lookǃ beholdǃ; reallyǃ?; come onǃ
5	Proto-Italic	en	in
6	Proto-Indo-European	h₁én	in

Step	Language	Word	Meaning
1	Latin	curiosus	Careful, diligent, thoughtful, devoted;...
2	Latin	-osus	-ose, -ous; full of, overly, prone to
3	Old Latin	-osos	accusative masculine plural of -ōsus
4	Latin	ont-to-s	—
5	Latin	-o-wont-to-s	—