Where does “niggerous” come from?

niggerous (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 “niggerous”, step by step

niggerous 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 nigger

StepLanguageWordMeaning
1EnglishniggerA black person; a person of black African...
2EnglishnegerSynonym of nigger
3Frenchnègrenegro; ghostwriter; friend, buddy
4Spanishnegroblack; a black person; ghost writer
5Latinnigrummasculine accusative singular of niger; neuter...
6Latinnigerwan, shining black; bad; evil; ill-omened
7Proto-Indo-Europeannókʷtsnight
8Proto-Indo-Europeannegʷ-bare, naked
Every word from Proto-Indo-European h₂él-Every word from Proto-Indo-European h₂eltósEvery word from Proto-Germanic aldaz
niggerous — Etymology, Origin & Word History | Etymology Explorer