'estimate-based' originates from English, specifically the words 'estimate' and 'base', where 'estimate' ultimately comes from Latin 'aestimare' (through Old French 'estimer') and 'base' comes from Latin and Greek 'basis' via Old French 'base'.

'estimate' changed from Latin 'aestimare' to Old French 'estimer' and then to Middle English 'estimate'; 'base' came from Greek 'basis' to Latin 'basis' to Old French 'base'; the compound 'estimate-based' is a modern English formation combining these elements to mean 'based on an estimate'.

Initially, 'aestimare' meant 'to value or judge the worth of'; over time 'estimate' came to mean 'an approximate calculation or judgment', and the compound 'estimate-based' came to mean 'formed or determined on the basis of such approximations'.