Keen
/kˈin/
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Definition
(adj) Often with a prepositional phrase, or with to and an infinitive: showing a quick and ardent responsiveness or willingness; eager, enthusiastic, interested.
Sentence Examples
A fence between makes love more keen.
I was keen on classical music in my school days.
CEFR Practice Quiz
He has a ____ interest in history and spends most of his free time reading books about ancient civilizations.