'insulation' originates from Latin, specifically the word 'insula,' meaning 'island,' combined with the suffix '-ation' to denote the process or result of making something isolated.

'insula' transformed into the Medieval Latin word 'insulatio,' and eventually became the modern English word 'insulation' through Middle English.

Initially, it meant 'to make into an island,' but over time it evolved into its current meaning of 'to isolate or protect from external influences.'