'accordionist' originates from the word 'accordion,' which comes from the German word 'Akkordeon,' where 'Akkord' meant 'musical chord.'

'Akkordeon' transformed into the English word 'accordion,' and eventually led to the formation of 'accordionist' to describe someone who plays the instrument.

Initially, it referred to someone who played the 'accordion,' and this meaning has remained consistent in modern usage.