'suddenly' originates from Middle English, specifically the word 'sodein,' where 'sodein' meant 'unexpected.' 'Move' originates from Latin, specifically the word 'movere,' where 'movere' meant 'to set in motion.'

'Sodein' transformed into the modern English word 'sudden,' and 'movere' transformed into the modern English word 'move' through Old French 'movoir.'

Initially, 'sodein' meant 'unexpected,' and 'movere' meant 'to set in motion.' These meanings have largely remained the same in modern usage.