'exactly-determined' originates from the combination of 'exactly' and 'determined', where 'exactly' comes from Latin 'exactus', meaning 'precisely', and 'determined' from Latin 'determinare', meaning 'to set bounds'.

'exactly-determined' evolved from the combination of the words 'exactly' and 'determined', which were used separately in Middle English and later combined in modern English.

Initially, it meant 'precisely defined', and this meaning has largely remained the same in modern usage.