Concertina (noun)

A musical instrument similar to an accordion, but smaller and with buttons instead of a keyboard.

Origin:

Late 19th century, from italian concertare "to agree", because the notes agree in this musical instrument.

Examples:

1. The busker was playing an upbeat tune on his concertina.
2. She played a beautiful melody on the concertina at the party.
3. He loves to play the concertina, but no one else seems to like it much.
4. The concertina has become a popular instrument for folk and traditional music.
5. The sound of the concertina filled the air as the children danced around.