'imperishable' originates from Latin, specifically the word 'imperitūrus,' where 'im-' meant 'not' and 'perīre' meant 'to perish.'

'imperitūrus' transformed into the French word 'imperissable,' and eventually became the modern English word 'imperishable' through Middle English.

Initially, it meant 'not subject to perishing,' and this meaning has largely remained the same in modern usage.