Where does “fiendishness” come from?

fiendishness (English) comes from English fiendish, from English fiend, from Middle English fēnd, from Old English fēond, from Proto-Germanic *fijand, from Proto-Germanic fijandz, from Proto-Germanic fijāną, from Proto-Indo-European peh₁- — to hate, hurt.

fiendishness (English): The quality of being fiendish

Definitions

  1. The quality of being fiendish

Ancestry of “fiendishness”, step by step

fiendishness traces back through two separate lines of ancestry.

via English fiendish

StepLanguageWordMeaning
1EnglishfiendishSinister; evil; like a fiend
2EnglishfiendA devil or demon; a malignant or diabolical...
3Middle EnglishfēndAn enemy, foe or fiend
4Old Englishfēondenemy; adversary, foe, enemy, fiend, devil,...
5Proto-Germanic*fijand
6Proto-Germanicfijandzenemy, fiend
7Proto-Germanicfijānąto hate; to dislike
8Proto-Indo-Europeanpeh₁-to hate, hurt

via English Ness

StepLanguageWordMeaning
1EnglishNessAn Ulster princess and the mother of Conchobar mac Nessa and Findchoem in the Ulster Cycle of Irish mythology. Daughter of Eochaid Sálbuide. Also the mother of Cormac Cond Longas by incest with Conchobar mac Nessa
2Middle Englishnesse
3Old Englishnæsnot, not at all; not; first/third-person singular...
4Proto-Germanicnasjąfoothill; headland; cape
5Proto-Indo-Europeannéh₂snose
Every word from Proto-Indo-European peh₁-