The story
- Middle Englishscorn
- Proto-Indo-European*pleh₁-
- Proto-Indo-European*pl̥h₁nós
- Proto-Germanic*fullaz
- Middle Englishscornful
- Proto-Indo-European*leyg-
- Proto-Germanic*līką
- Middle Englishscornfully
- English todayscornfully
Inherited from Middle English scornfully; equivalent to scornful + -ly (adverbial suffix).
Etymology from Wiktionary, CC BY-SA 4.0.