'unsynchronize' originates from the prefix 'un-' meaning 'not' and the verb 'synchronize', which comes from Greek 'synchronos', where 'syn-' meant 'together' and 'chronos' meant 'time'.

'synchronize' changed from the Greek word 'synchronos' and eventually became the modern English word 'synchronize'. The prefix 'un-' was added to form 'unsynchronize'.

Initially, 'synchronize' meant 'to occur at the same time', and 'unsynchronize' evolved to mean 'to stop occurring at the same time'.