'accidentally-found' originates from the combination of 'accidentally' and 'found', where 'accidentally' comes from Latin 'accidentalis', meaning 'happening by chance', and 'found' is the past participle of 'find', from Old English 'findan'.

'accidentally' evolved from the Latin 'accidentalis' through Old French 'accidental', while 'found' comes from Old English 'findan'.

Initially, 'accidentally' meant 'by chance', and 'found' meant 'discovered'. The combined term retains the original meanings of both words.