This is the 4371st most frequent French word.
férus
Enthusiasts or passionate about something.
Here, 'férus' is used as an adjective to describe individuals who have a keen interest or passion for a subject, in this case, literature.
Les étudiants férus de littérature passaient leurs après-midi à la bibliothèque.
The students passionate about literature spent their afternoons at the library.
In this example, 'férus' (feminine form 'férue') illustrates someone's personal and in-depth interest in a particular subject - ancient history.
Elle est férue d'histoire ancienne et peut discuter des dynasties pendant des heures.
She is enthusiastic about ancient history and can discuss dynasties for hours.
Here, 'férus' is applied to demonstrate a collective interest or enthusiasm for an ongoing topic, which is technological advancements.