Where does “spatious” come from?

spatious (English) comes from Latin spatiosus, from Latin spatium, from Proto-Indo-European spéh₁-, from Proto-Indo-European speh₁- — to succeed, to prosper.

Ancestry of “spatious”, step by step

Step	Language	Word	Meaning
1	Latin	spatiosus	spacious, roomy; wide, long
2	Latin	spatium	Space, room, extent; Distance between points; A...
3	Proto-Indo-European	spéh₁-	to succeed, to prosper
4	Proto-Indo-European	speh₁-	to succeed, to prosper

Words derived from “spatious”

spatiously
spatiousness

Every word from Proto-Indo-European speh₁- →Every word from Proto-Indo-European spéh₁- →Every word from Latin spatium →