on the far side of
Etymology
Old EnglishMiddle EnglishEnglish
The phrase builds on the Old English 'feor' (distant) + 'sīde' (flank, edge). 'The far side of' has been used since at least the 1400s to mean the opposite or more distant side of a physical object. By the 1700s it had extended figuratively to mean 'beyond a point' in time or age. The modern idiomatic use — especially with ages ('on the far side of fifty') — became common in the 1800s.