'inadvertently-expired' is a compound word formed from 'inadvertently' and 'expired'. 'Inadvertently' originates from Latin, specifically the word 'inadvertentem', where 'in-' meant 'not' and 'advertentem' meant 'turning the mind to'. 'Expired' comes from Latin 'exspirare', where 'ex-' meant 'out' and 'spirare' meant 'to breathe'.

'Inadvertently' changed from the Latin word 'inadvertentem' and eventually became the modern English word 'inadvertently'. 'Expired' transformed from the Latin 'exspirare' to the French 'expirer', and eventually became the modern English word 'expired'.

Initially, 'inadvertently' meant 'not turning the mind to', and 'expired' meant 'to breathe out'. Over time, 'inadvertently' evolved to mean 'unintentionally', and 'expired' evolved to mean 'having come to an end'.