Where does “indig” come from?

indig (Ojibwe) comes from Old Irish ind-, from Proto-Celtic ande-, from Proto-Indo-European h₁n̥dó, from Proto-Indo-European h₁én — in.

Ancestry of “indig”, step by step

StepLanguageWordMeaning
1Old Irishind-Alternative form of id-; inside, within
2Proto-Celticande-intensive prefix; inside, within
3Proto-Indo-Europeanh₁n̥dóinto, inside
4Proto-Indo-Europeanh₁énin
Every word from Proto-Indo-European h₁én →Every word from Proto-Indo-European h₁n̥dó →Every word from Old Irish ind- →