etude
US /ˈeɪ.tuːd/
UK /ˈeɪ.tuːd/

1.
etiuda
a short musical composition, typically for one instrument, designed as an exercise to improve the technique or skill of the player.
:
•
The pianist practiced the challenging Chopin etude for hours.
Pianista ćwiczył wymagającą etiudę Chopina przez wiele godzin.
•
Many composers have written beautiful etudes for various instruments.
Wielu kompozytorów napisało piękne etiudy na różne instrumenty.