Where does “dochma” come from?

dochma (Middle Irish) comes from Old Irish do-, from Proto-Celtic dus-, from Proto-Indo-European dus-, from Proto-Indo-European dēwǝ- — to fail, be behind, be lacking.

Ancestry of “dochma”, step by step

StepLanguageWordMeaning
1Old Irishdo-impossible, extremely difficult; ill, evil;...
2Proto-Celticdus-bad
3Proto-Indo-Europeandus-bad
4Proto-Indo-Europeandēwǝ-to fail, be behind, be lacking
Every word from Proto-Indo-European dēwǝ- →Every word from Proto-Indo-European dus- →Every word from Old Irish do- →