'predictably-kept' originates from the combination of 'predictably' and 'kept'. 'Predictably' comes from 'predict', which originates from Latin 'praedicere', where 'prae-' meant 'before' and 'dicere' meant 'to say'. 'Kept' is the past participle of 'keep', which comes from Old English 'cēpan', meaning 'to seize or hold'.

'Predictably' evolved from the Latin 'praedicere' through Middle English 'predicten', while 'kept' evolved from Old English 'cēpan'.

Initially, 'predictably' meant 'able to be foretold', and 'kept' meant 'held or maintained'. Together, they imply something maintained in a foreseeable manner.