'unpredictably-updated' is a compound word formed from 'unpredictable' and 'updated'. 'Unpredictable' originates from Latin, specifically the word 'praedicere', where 'prae-' meant 'before' and 'dicere' meant 'to say'. 'Updated' comes from the Latin 'up-' meaning 'up' and 'date' from 'datum', meaning 'given'.

'Unpredictably-updated' combines the English words 'unpredictable' and 'updated', which have been used in modern English since the 20th century.

Initially, 'unpredictable' meant 'not able to be predicted', and 'updated' meant 'brought up to date'. Together, they describe something that is updated in an unpredictable manner.