Where does “keenly” come from?

Keenly comes from Middle English kenely, from Old English cēnlīċe, an adverb form related to bold or fierce behavior.

keenly (English): In a keen manner

Definitions

  1. In a keen manner

Ancestry of “keenly”, step by step

StepLanguageWordMeaning
1Middle Englishkenely—
2Old Englishcēnlīċekeenly, boldly
3Old English-līċely (adverbial suffix)
4Old English-eforming adverbs from adjectives; -ly
5Old English-enmæġþ + API → mæġden; cocc + API → cycen, cicen;...
6Old Norse-innUsed to create adjectives from nouns, meaning...
7Proto-Norse-īna-—
8Proto-Germanic-īnaz-en
9Proto-Indo-European-iHnosCreates adjectives of materials
10Proto-Indo-European-no-adjectival suffix
Every word from Proto-Indo-European -no- →Every word from Proto-Germanic -īnaz →Every word from Old English -en →