|adjective|
1.having a fine edge or point : sharp
a keen knife
2.having or showing mental sharpness
a keen observation
3.very sensitive (as in seeing, smelling, or hearing)
keen eyesight
4.full of enthusiasm : eager
… everybody was very keen to hear details of what had happened …— J. K. Rowling, Goblet of Fire
5.seeming to cut or sting
a keen wind
|noun|
1.a lamentation for the dead uttered in a loud wailing voice or sometimes in a wordless cry
|verb|
1.to make a loud and long cry of sorrow : to lament with a keen
2.to make a sound suggestive of a loud cry of sorrow
a keening siren
3.to lament, mourn, or complain loudly
4.to utter with a loud wailing voice or wordless cry
keened our sorrow— Punch
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