'terminator' originates from Latin, specifically the word 'terminare,' where 'terminus' meant 'end' or 'boundary.'

'terminare' transformed into the Medieval Latin word 'terminator,' and eventually became the modern English word 'terminator.'

Initially, it meant 'one who sets boundaries,' but over time it evolved into its current meanings of 'a person or thing that ends something' and 'the dividing line on a planetary body.'