Where does “spatiously” come from?

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

Ancestry of “spatiously”, step by step

spatiously traces back through two separate lines of ancestry.

via English spatious

StepLanguageWordMeaning
1Englishspatious—
2Latinspatiosusspacious, roomy; wide, long
3LatinspatiumSpace, room, extent; Distance between points; A...
4Proto-Indo-Europeanspéh₁-to succeed, to prosper
5Proto-Indo-Europeanspeh₁-to succeed, to prosper

via English ly

StepLanguageWordMeaning
1EnglishlyAbbreviation of light-year
2VietnameselyAlternative spelling of li
Every word from Proto-Indo-European speh₁- →Every word from Proto-Indo-European spéh₁- →Every word from Latin spatium →