The story
- Old English · inherited from*spēdiġlīċe
- Middle English · inherited fromspedily
- English todayspeedily
From Middle English spedily, spedili, from Old English *spēdiġlīċe, ġespēdiġlīċe (“prosperously”), equivalent to speedy + -ly. Cognate with Scots spedely, spedelie (“quickly, speedily”). Compare also Old English spēdlīċe (“effectually, effectively, successfully, efficaciously, powerfully, in a manner which produces a result”).
Etymology from Wiktionary, CC BY-SA 4.0.