'predictably-reduced' originates from the combination of 'predictably' and 'reduced'. 'Predictably' comes from 'predict', which originates from Latin 'praedicere', where 'prae-' meant 'before' and 'dicere' meant 'to say'. 'Reduced' comes from Latin 'reducere', where 're-' meant 'back' and 'ducere' meant 'to lead'.

'Predictably' evolved from the Latin 'praedicere' through Old French 'predire', and 'reduced' evolved from Latin 'reducere' through Old French 'reducir'.

Initially, 'predictably' meant 'able to be foretold', and 'reduced' meant 'brought back'. Over time, 'predictably-reduced' evolved to mean 'decreased in a manner that was expected'.