Meanings
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1
adv
in a keen and discriminating manner
During the first week of training we became keenly aware of our own shortcomings.
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2
adv
In a keen manner.
Watch something keenly.
Etymology
From Middle English kenely, kenliche, from Old English cēnlīċe (“keenly, boldly, courageously”), equivalent to keen + -ly. Cognate with Saterland Frisian köinlik (“boldly”), archaic German kühnlich (“bravely”).