'adiamorphism' originates from Greek, specifically the word 'adiamorphos,' where 'a-' meant 'without' and 'morphos' meant 'form.'

'adiamorphos' transformed into the English word 'adiamorphism' through the addition of the suffix '-ism' to denote a state or condition.

Initially, it meant 'without form,' and this meaning has largely remained the same in modern usage.