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4.1
History
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keen adjective [ kiːn ]

• having or showing eagerness or enthusiasm.
• "a keen gardener"
Similar: eager, anxious, impatient, determined, desirous, longing, wishing, itching, dying, yearning, ambitious, ready, intent on, raring, enthusiastic, avid, ardent, passionate, fervent, fervid, impassioned, wholehearted, zestful, zealous, driven, willing, conscientious, committed, dedicated, diligent, earnest, industrious, assiduous, intent,
Opposite: reluctant, apathetic, half-hearted,
• (of a sense) highly developed.
• "I have keen eyesight"
Similar: acute, sharp, penetrating, discerning, sensitive, perceptive, piercing, clear, observant, powerful,
Opposite: weak, defective,
• (of the edge or point of a blade) sharp.
• "the keen blade went through the weeds"
Similar: sharp, sharp-edged, sharpened, honed, razor-like, razor-sharp, whetted, fine-edged,
Opposite: blunt,
• (of activity or feeling) intense.
• "there could be keen competition to provide the service"
Similar: intense, acute, extreme, fierce, violent, passionate, consuming, burning, fervent, fervid, ardent, strong, powerful, profound, deep-seated,
• excellent.
• "I would soon fly to distant stars—how keen!"
Origin: Old English cēne ‘wise, clever’, also ‘brave, daring’, of Germanic origin; related to Dutch koen and German kühn ‘bold, brave’. Current senses date from Middle English.

keen verb

• wail in grief for a dead person.
• "the body of Johnny was taken by his own people who keened over him"
Similar: lament, mourn, weep, cry, sob, sorrow, grieve, wail, moan, whine, whimper, groan, howl, greet, plain, ululate,

keen noun

• an Irish funeral song accompanied by wailing in lamentation for the dead.
Origin: mid 19th century: from Irish caoinim ‘I wail’.

as keen as mustard

• extremely eager or enthusiastic.



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