Main Entry: ⁴fell

Function: adjective

Etymology: Middle English fel, from Anglo-French — more at felon

Date: 14th century

1 a : fierce, cruel, terrible b : sinister, malevolent <a fell purpose> c : very destructive : deadly <a fell disease>
2 Scottish : sharp, pungent

— fell·ness noun

— fel·ly \ˈfel-lē\ adverb