The story
- Proto-Indo-European*(h₁)ém-no-
- Proto-Germanic*ebnaz
- Proto-Indo-European*leyg-
- Proto-Germanic*līką
- Proto-Germanic*ebnalīkaz
- Proto-West Germanic*ebnalīk
- Old Englishefnlīċ
- Old Englishefnlīċe
- Middle Englishevenly
- English todayevenly
From Middle English evenly, evenliche, from Old English efenlīċe (“evenly, alike, equally”), equivalent to even + -ly.
Etymology from Wiktionary, CC BY-SA 4.0.