'predictably-moving' originates from the words 'predict' and 'move'. 'Predict' comes from Latin, specifically the word 'praedicere,' where 'prae-' meant 'before' and 'dicere' meant 'to say'. 'Move' comes from Latin 'movere', meaning 'to move'.

'predictably-moving' combines the adjective 'predictable' with the present participle 'moving', forming a compound adjective.

Initially, 'predict' meant 'to say before', and 'move' meant 'to change position'. Together, they evolved to describe something that moves in a foreseeable manner.