The story
- Old English · inherited fromēaþelīce
- Middle English · inherited fromeaðelice
- English todayeathly
From Middle English eaðelice, eaþelic, eðeliche, eþeliche, from Old English ēaþelīce, īþelīċe, īeþelīce; equivalent to eath + -ly.
Etymology from Wiktionary, CC BY-SA 4.0.