'blossom' originates from Old English, specifically the word 'blōstm', where 'blōst' meant 'flower' or 'bloom'.

'blōstm' transformed into the Middle English word 'blosme', and eventually became the modern English word 'blossom'.

Initially, it meant 'flower' or 'bloom', but over time it evolved to also mean 'to flourish or develop'.