'predictably-proven' originates from the combination of 'predictably' and 'proven', where 'predictably' comes from 'predict', meaning 'to foresee or anticipate', and 'proven' is the past participle of 'prove', meaning 'to demonstrate the truth or existence of something'.

'predictably' evolved from the Latin word 'praedicere', meaning 'to foretell', and 'proven' comes from the Latin 'probare', meaning 'to test or prove'.

Initially, 'predictably' meant 'in a manner that can be predicted', and 'proven' meant 'demonstrated to be true'. Together, they convey the idea of something being shown to be true in an expected manner.