concertina

definition: free-reed instrument played like an accordion by pushing its ends together to force air through the reeds
example:
speech part: noun
synonyms:
definition: coiled barbed wire used as an obstacle
example:
speech part: noun
synonyms:
definition: to collapse like a concertina
example:
speech part: verb
synonyms:

concertina is explained and pronounced

How concertina is being used?