Where does “fiendish” come from?

Fiendish derives from Middle English -isch and Old English -isċ suffixed to Old English fēond, from Proto-Germanic fijandz meaning enemy, ultimately from Proto-Indo-European peh₁-.

fiendish (English): Sinister; evil; like a fiend

Definitions

  1. Sinister; evil; like a fiend

Ancestry of “fiendish”, step by step

StepLanguageWordMeaning
1EnglishfiendA devil or demon; a malignant or diabolical...
2Middle EnglishfēndAn enemy, foe or fiend
3Old Englishfēondenemy; adversary, foe, enemy, fiend, devil,...
4Proto-Germanic*fijand
5Proto-Germanicfijandzenemy, fiend
6Proto-Germanicfijānąto hate; to dislike
7Proto-Indo-Europeanpeh₁-to hate, hurt

Words derived from “fiendish

Every word from Proto-Indo-European peh₁-