'inexpertly-managed' originates from the combination of 'inexpertly' and 'managed'. 'Inexpertly' comes from 'inexpert', which is derived from Latin 'inexpertus', where 'in-' meant 'not' and 'expertus' meant 'experienced'.

'Inexpertus' transformed into the Old French word 'inexpert', and eventually became the modern English word 'inexpert'.

Initially, 'inexpert' meant 'not experienced', and over time it evolved into its current meaning of 'lacking skill or expertise'.