'four-sided' originates from the combination of 'four' and 'side', where 'four' is derived from Old English 'feower' and 'side' from Old English 'sīde', meaning 'edge'.

'four-sided' evolved from the Old English terms 'feower' and 'sīde', eventually forming the modern English term 'four-sided'.

Initially, it meant 'having four edges', and this meaning has largely remained the same in modern usage.