is concertinaing

• present progressive

  present progressive

  Used to describe an ongoing action or state that is currently taking place in the immediate present.

  of concertina (3rd person singular).
  concertina

  noun

  a musical instrument resembling an accordion but having buttonlike keys, hexagonal bellows and ends, and a more limited range.

More Suggestions

• concerning
• concertina
• concert tuning
• concertina wire
• concertino
• concernment
• concert grand
• concert party
• concertante