'customarily-preserved' originates from the combination of 'customarily,' which comes from 'custom,' and 'preserved,' which comes from 'preserve.' 'Custom' originates from Latin 'consuetudo,' meaning 'habit or usage,' and 'preserve' comes from Latin 'praeservare,' meaning 'to keep safe.'

'customarily' evolved from the Old French 'costumier,' and 'preserved' from the Old French 'preserver,' eventually forming the modern English term 'customarily-preserved.'

Initially, 'customarily' meant 'according to custom,' and 'preserved' meant 'kept safe.' Over time, the combined term 'customarily-preserved' evolved to mean 'kept according to traditional practices.'