'predictably-extended' originates from the combination of 'predictably' and 'extended'. 'Predictably' comes from 'predict', which originates from Latin 'praedicere', meaning 'to say beforehand'. 'Extended' comes from Latin 'extendere', meaning 'to stretch out'.

'predictably' evolved from the Latin 'praedicere' through Old French 'predire', and 'extended' evolved from Latin 'extendere' through Old French 'estendre'.

Initially, 'predictably' meant 'in a manner that can be predicted', and 'extended' meant 'stretched out'. Together, they imply an extension that was anticipated.