'far-apart' originates from the combination of 'far' and 'apart', where 'far' meant 'at a great distance' and 'apart' meant 'separated by a distance'.

'far' and 'apart' were used separately in Old English and Middle English, and eventually combined to form the modern English term 'far-apart'.

Initially, it meant 'separated by a distance', and this meaning has largely remained the same in modern usage.