This is the 7351st most frequent Catalan word.
aquarel
Watercolor.
'Aquarel' is used here as the noun referring to the medium with which art is created - watercolor.
L'artista va pintar un paisatge amb aquarel.
The artist painted a landscape with watercolor.
Here, 'aquarel' acts as a direct object in a sentence, expressing the item being learned or practiced.
Estic aprenent a pintar amb aquarel a les meves classes d'art.
I am learning to paint with watercolor in my art classes.
In this sentence, 'aquarel' functions as a modifier for the kit, describing what kind of painting toolset it is.