Where does “augurious” come from?

augurious (English) comes from English ous, from English ou, from Afrikaans ou, from Dutch oud, from Middle Dutch out, from Old Dutch ald, from Proto-West Germanic ald, from Proto-Germanic aldaz — to grow, nourish.

Ancestry of “augurious”, step by step

augurious traces back through two separate lines of ancestry.

via English ous

StepLanguageWordMeaning
1Englishousplural of ou
2EnglishouA probably extinct species of Hawaiian...
3AfrikaansouAn old fellow, guy, bloke; attributive form of...
4Dutchoudold
5Middle Dutchoutold
6Old Dutchald
7Proto-West Germanicaldold
8Proto-Germanicaldazold, grown up
9Proto-Indo-Europeanh₂eltós
10Proto-Indo-Europeanh₂él-to grow, nourish

via English augury

StepLanguageWordMeaning
1EnglishauguryA divination based on the appearance and...
2Old Frenchaugurie
3Latinauguriumaugury; divination, prediction; omen, portent
4Latinauguraugur (priest, diviner, or soothsayer, one who foretold the future in part by interpreting the song and flight of birds)
5Latvianaugoslocative plural form of augs; locative plural...
6Proto-Indo-Europeanh₂ewg-to increase, to enlarge
7Proto-Indo-Europeanh₂weg-to increase, to enlarge
8Proto-Indo-Europeanh₂ug-
Every word from Proto-Indo-European h₂él-Every word from Proto-Indo-European h₂eltósEvery word from Proto-Germanic aldaz
augurious — Etymology, Origin & Word History | Etymology Explorer