'fortuitously-improved' originates from the combination of 'fortuitous' and 'improved'. 'Fortuitous' comes from Latin, specifically the word 'fortuitus', where 'forte' meant 'by chance'. 'Improved' comes from the Old French 'emprover', where 'en-' meant 'in' and 'pro' meant 'for'.

'Fortuitous' changed from the Latin word 'fortuitus' and eventually became the modern English word 'fortuitous'. 'Improved' evolved from the Old French 'emprover' to the modern English 'improve'.

Initially, 'fortuitous' meant 'by chance', and 'improved' meant 'to make better'. Together, they convey the idea of something made better by chance.