'predictably-arranged' originates from the combination of 'predictably' and 'arranged'. 'Predictably' comes from 'predict', which originates from Latin 'praedicere', meaning 'to foretell'. 'Arranged' comes from Old French 'arangier', meaning 'to set in order'.

'predictably-arranged' evolved from the combination of 'predictably' and 'arranged', which were used separately in Middle English and eventually combined in modern English.

Initially, 'predictably' meant 'in a manner that can be predicted', and 'arranged' meant 'set in order'. The combined term retains these meanings.