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Word of the Day Tuesday, September 1, 2026

keen

/kiːn/ adjective · British & US
Valid in UKValid in US
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What does keen mean?

The word keen is an adjective that describes something as having a strong and sharp quality or effect. It can refer to physical senses, such as sight or smell, or emotional states, such as desire or interest. Keen is often used to convey a sense of intensity or sharpness, and can be used in a variety of contexts, from formal writing to informal conversation. In some cases, keen can be used as an adverb to mean 'very' or 'extremely'. The word has a long history, dating back to Old English, and has evolved over time to encompass a range of meanings. Despite its versatility, keen is a useful word to know, as it can add depth and nuance to one's language. By understanding the different senses and connotations of keen, individuals can use it effectively in their own writing and speech.

adjective

Having a strong and keen sense of sight or smell; sharp or penetrating in quality or effect.

Example

"She had keen eyesight and could spot the bird from a distance."

In formal contexts, keen is often used to describe physical senses.

adjective

Having a strong and eager desire or interest.

Example

"He had a keen interest in photography and spent hours editing his photos."

In informal contexts, keen can be used to describe emotional states.

Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.

Etymology of keen

The word keen originated from Old English cēon, which was derived from Proto-Germanic *kainiz. This word is thought to have come from Proto-Indo-European *kei-, which meant 'to cut' or 'to pierce'. Over time, the meaning of keen expanded to include a range of senses, from physical sharpness to emotional intensity. Today, keen is a common word in both British and American English, and is used in a variety of contexts.

How keen is actually used

The word keen can be used to describe both physical senses and emotional states. It is often used to convey a sense of sharpness or intensity. In informal contexts, keen can be used as an adverb to mean 'very' or 'extremely'.

What's another word for keen?

What's the opposite of keen?

Rhymes with keen