'allassotonic' originates from Greek, specifically the word 'allasso,' where 'allasso' meant 'to change' and 'tonic' relates to 'tone or tension.'

'allasso' transformed into the modern English word 'allassotonic' by combining with 'tonic' to describe changes in tone or tension.

Initially, it meant 'to change tone or tension,' and this meaning has largely remained the same in modern usage.