This is the 9733rd most frequent Swedish word.
gitarr
"Gitarr" means "guitar" in English.
Here, 'gitarr' is used as an object of the verb 'spelar' to indicate the musical instrument being played.
Hon spelar gitarr varje kväll.
She plays the guitar every evening.
In this sentence, 'gitarr' is a noun referring to an item that was purchased.
Han köpte en ny gitarr för sin födelsedag.
He bought a new guitar for his birthday.
The word 'gitarren' is used here in its definite form to specify a particular guitar.