'unconventionally-preserved' originates from the prefix 'un-' meaning 'not,' combined with 'conventionally,' which comes from 'convention,' and 'preserved,' from Latin 'praeservare,' meaning 'to keep safe.'

'unconventionally-preserved' evolved from the combination of 'unconventional' and 'preserved,' reflecting a modern adaptation of traditional preservation methods.

Initially, it meant 'not preserved in a traditional manner,' and this meaning has largely remained the same in modern usage.