Where does “ath-roinn” come from?

ath-roinn (Scottish Gaelic) comes from Scottish Gaelic roinn, from Middle Irish roinded, from Old Irish rann, from Proto-Celtic *ɸrasnā — part.

ath-roinn (Scottish Gaelic): redivide, subdivide; verbal noun of ath-roinn;...

Definitions

  1. redivide, subdivide; verbal noun of ath-roinn;...

Ancestry of “ath-roinn”, step by step

ath-roinn traces back through two separate lines of ancestry.

via Scottish Gaelic roinn

StepLanguageWordMeaning
1Scottish Gaelicroinngroup, sect, section, class; category, allotment;...
2Middle Irishroindedparts, separates; distributes, apportions
3Old Irishrannpart
4Proto-Celtic*ɸrasnāpart

via Scottish Gaelic ath

StepLanguageWordMeaning
1Scottish Gaelicathnext
2Old Irisháthford; open space or hollow between two objects
3Proto-Celticyātusford
4Proto-Indo-Europeanyeh₂-to go; to go in, enter; to ride, to travel
Every word from Proto-Celtic *ɸrasnāEvery word from Old Irish rannEvery word from Middle Irish roinded