accordioned

noun Music.

1. Also called piano accordion. a portable wind instrument having a large bellows for forcing air through small metal reeds, a keyboard for the right hand, and buttons for sounding single bass notes or chords for the left hand.
2. a similar instrument having single-note buttons instead of a keyboard.

adjective

3. having a fold or folds like the bellows of an accordion: accordion roof; accordion panel.

verb (used without object)

4. (of a door, roof, or other covering) to open by folding back or pressing together in the manner of an accordion: The roof of the car accordions to let in sunlight and fresh air.
5. to fold, crush together, or collapse in the manner of an accordion.

verb (used with object)

6. to demolish by crushing together lengthwise: The impact accordioned the car beneath the truck.

noun

1. a portable box-shaped instrument of the reed organ family, consisting of metallic reeds that are made to vibrate by air from a set of bellows controlled by the player’s hands. Notes are produced by means of studlike keys
2. short for piano accordion

n.

1831, from German Akkordion, from Akkord “musical chord, concord of sounds, be in tune” (cf. Italian accordare “to attune an instrument”); ultimately from same source as English accord (v.), with suffix on analogy of clarion, etc. Invented 1829 by piano-maker Cyrill Demian (1772-1847) of Vienna.