Where does “azurous” come from?

azurous (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 “azurous”, step by step

azurous 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 azure

StepLanguageWordMeaning
1EnglishazureThe clear blue colour of the sky; also, a pigment...
2Middle Englishasurelapis lazuli; ultramarine, azure pigment; azure,...
3Old Frenchazurazure
4Arabicلَازَوَرْدazure; lapis lazuli
5PersianلاژوردAlternative form of لاجورد; blue color
6Proto-Iranian*varta-
7Proto-Indo-Europeanwēl-to see, perceive
Every word from Proto-Indo-European h₂él-