The story
- Old Norse · derived fromdáðlauss“without virtue, incapable, lacking in courage and drive, despicable, cowardly”
- English todaydeedless
From deed + -less; obsolete sense is from earlier dadless, probably from Old Norse dáðlauss (“without virtue, incapable, lacking in courage and drive, despicable, cowardly”). Cognate with Danish dådløs (“non-heroic”), Swedish dådlös (“listless, shiftless”).
Etymology from Wiktionary, CC BY-SA 4.0.