Where does “cróderg” come from?

cróderg (Middle Irish) comes from Old Irish derg, from Proto-Celtic dergos, from Proto-Indo-European dʰerg-, from Proto-Indo-European dʰer- — to support; to hold.

Ancestry of “cróderg”, step by step

cróderg traces back through two separate lines of ancestry.

via Old Irish derg

StepLanguageWordMeaning
1Old Irishdergred
2Proto-Celticdergosred crimson
3Proto-Indo-Europeandʰerg-to dim, darken; dim, dull; dark, dusky
4Proto-Indo-Europeandʰer-to support; to hold

via Old Irish crú

StepLanguageWordMeaning
1Old Irishcrúblood
2Proto-Celtickrowosblood
3Proto-Indo-Europeankréwh₂sblood
4Proto-Indo-Europeankrewh₂-blood outside the body
Every word from Proto-Indo-European dʰer- →Every word from Proto-Indo-European dʰerg- →Every word from Proto-Celtic dergos →