accordion

US /əˈkɔːr.di.ən/
UK /əˈkɔːr.di.ən/
"accordion" picture
1.

a portable musical instrument with a keyboard and bellows, played by squeezing the bellows to force air through reeds, which produce sounds when vibrated.

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He played a lively tune on his accordion.
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The street performer entertained the crowd with his accordion music.
:
squeezebox
1.

to fold or compress something in a way that resembles the bellows of an accordion.

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The paper accordioned as it went through the printer.
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The car's front end accordioned in the collision.
:
foldpleatcreasecompress