aquarel

In a sentence

• L'artista va pintar un paisatge amb aquarel.

  The artist painted a landscape with watercolor.

  'Aquarel' is used here as the noun referring to the medium with which art is created - watercolor.

• Estic aprenent a pintar amb aquarel a les meves classes d'art.

  I am learning to paint with watercolor in my art classes.

  Here, 'aquarel' acts as a direct object in a sentence, expressing the item being learned or practiced.

• Vaig comprar un kit d'aquarel per començar a pintar.

  I bought a watercolor kit to start painting.

  In this sentence, 'aquarel' functions as a modifier for the kit, describing what kind of painting toolset it is.