'suddenly' originates from Middle English, specifically the word 'sodeynly,' where 'sodeyn' meant 'unexpected.' 'Change' originates from Old French, specifically the word 'changier,' where 'changier' meant 'to alter or exchange.'

'sodeynly' transformed into the modern English word 'suddenly,' and 'changier' evolved into 'change' through Middle English.

Initially, 'suddenly' meant 'unexpectedly,' and this meaning has largely remained the same in modern usage. 'Change' initially meant 'to alter or exchange,' and this meaning has also remained consistent.