'peacefully-gathered' originates from the combination of 'peacefully' and 'gathered', where 'peacefully' is derived from 'peace' meaning 'freedom from disturbance' and 'gathered' from 'gather' meaning 'to come together'.

'peacefully' evolved from the Old English 'pēas' meaning 'peace' and 'gathered' from the Old English 'gadrian' meaning 'to collect'.

Initially, 'peacefully-gathered' meant 'to come together without conflict', and this meaning has largely remained the same in modern usage.