This is the 10356th most frequent French word.
intéressée
"Intéressée" means "interested" or "self-serving" (depending on context).
In this sentence, "intéressée" serves as an adjective describing the subject "Elle", expressing her interest in the activity "la peinture".
Elle est très intéressée par la peinture.
She is very interested in painting.
Here, "intéressée" functions as an adjective in nominal form, referring to a specific person who is interested, which is generalizable to individuals showing interest in the course.
La personne intéressée peut s'inscrire au cours.
The interested person can enroll in the course.
In this usage, "intéressé" is the masculine form of the adjective, conjugated to match with "il", indicating his lack of engagement or interest in "ce projet".