adjective
avid
AV-id/ˈævɪd/
Very eager or enthusiastic about something.
An avid reader, she always carries a book on the train.

Etymology
Latin avidus expressed intense longing and could suggest greed. In the selected sense, the same intensity appears as enthusiasm for an activity or interest.
In context
Charles was an avid art collector and patron of the arts and commissioned many famous works during his reign.
More examples
- He is an avid collector of old postcards.
- The children listened with avid interest to the explorer's story.
- Several avid fans waited outside the stadium.
Forms
avidly adverb — With strong interest or eager enthusiasm.
Similar words
- eager
- Describes readiness or desire without implying a lasting enthusiasm.
- enthusiastic
- Emphasizes positive excitement more than intense appetite or interest.