keenly
/ˈkiːnli/ adverb C1- In a keen manner. · watch something keenly· We played keenly.
From the library
The old woman faced round and looked keenly at him from her little red-rimmed eyes.
Then he walked slowly up the street, and then down again to the corner, still looking keenly at the houses.
Over the edge there peeped a clean-cut, boyish face, which looked keenly about it, and then, with a hand on either side of the aperture, drew itself shoulder-high and waist-high, until one knee rested upon the edge.
“Ah,” said Anthony, keenly; “what’s her name?”
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