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keen

SayKEEN/kin/UK/kiːn/

12 meanings of keen

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  1. 1
    eageradjectiveCommonwealth
    Showing quick and eager willingness or interest, often directed toward an activity or goal.

    Investors were keen to back the project once the figures were released.

    He has always been a keen gardener, up at dawn among the flower beds.

    UsageKeen on a thing or person, keen to + verb: keen to learn. I'm keen alone can mean yes, gladly.

    Similareager, enthusiastic, avid, ardent, passionate

    Oppositereluctant, unwilling, unenthusiastic, indifferent

  2. 2
    sharp mindadjective
    Showing quick, sharp understanding; mentally acute and penetrating in perception or judgment.

    The detective brought a keen intelligence to every case she handled.

    A keen observer, he noticed the slight tremor in the witness's voice.

    UsageCommon in a keen eye, a keen mind and a keen observer.

    Similarsharp, astute, acute, shrewd, perceptive

    Oppositedull, obtuse

    Note

    Mental sharpness is older in this word than it looks. Old English cēne could already mean learned, clever or wise. Behind it lies a Germanic word for the knowledgeable and skillful, from a root meaning "to know." A keen mind is therefore close to the word's origins. It pairs naturally with wits, thought and inquiry: Shakespeare's wits made "more keen," or Cowper's "keen inquiry of her thought."

    Checked 31 Oct 2026 · 4 facts

    • Old English cēne already had meanings relating to learning and intelligence. en.wiktionary.org
    • Keen descends from a Germanic adjective meaning knowledgeable and skillful, ultimately from a root meaning to know. en.wiktionary.org
    • Shakespeare's A Lover's Complaint contains the wording about making wits more keen; the speaker is the young woman recounting her experience. internetshakespeare.uvic.ca
    • Cowper's Table Talk contains the quoted phrase. en.wiktionary.org
  3. 3
    fierceadjective
    Fierce, intense, and forceful in degree.

    The two bakeries on Main Street have been in keen competition for years.

    There was keen disappointment among the fans after the narrow loss.

    UsageCommon in keen competition.

    Similarintense, fierce, acute, strong, bitter

    Oppositemild, slight

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Origins

Meanings 1–5, 8–12

Old English cēne could mean keen, fierce, bold or brave, and also clever or wise. It became Middle English kene ("bold, brave, sharp") and goes back to Proto-Germanic *kōniz ("knowledgeable, skillful, clever") and finally to the Proto-Indo-European root *ǵneh₃-, "to know." German kühn ("bold, daring") is related, as are the English words cunning and can.

Meanings 6–7

From Irish, meaning "to lament, keen."

Checked 31 Oct 2026 · 1 fact

  • Keen, in its lamentation sense, derives from an Irish word meaning “to lament, keen.” en.wiktionary.org