Where does “deaslabhartha” come from?

deaslabhartha (Irish) comes from Irish deas, from Old Irish dess, from Proto-Celtic dexswos, from Proto-Indo-European deḱswo-, from Proto-Indo-European deḱs- — right.

Ancestry of “deaslabhartha”, step by step

deaslabhartha traces back through two separate lines of ancestry.

via Irish deas

StepLanguageWordMeaning
1Irishdeassouth, southerly, to the south; right,...
2Old Irishdessright; south
3Proto-Celticdexswosright; south
4Proto-Indo-Europeandeḱswo-
5Proto-Indo-Europeandeḱs-right

via Irish labhartha

StepLanguageWordMeaning
1Irishlabharthapast participle of labhair; genitive singular of...
Every word from Proto-Indo-European deḱs-Every word from Proto-Indo-European deḱswo-Every word from Proto-Celtic dexswos