'haphazardly-overseen' is a compound word combining 'haphazardly' and 'overseen'. 'Haphazardly' originates from the word 'haphazard', which comes from the Old French 'hasard', meaning 'game of chance'. 'Overseen' is the past participle of 'oversee', which comes from Middle English 'overseon', meaning 'to look over'.

'Haphazardly' evolved from 'haphazard', which was influenced by the Old French 'hasard'. 'Overseen' evolved from the Middle English 'overseon', which was influenced by the Old English 'oferseon'.

Initially, 'haphazardly' meant 'by chance', and 'overseen' meant 'to look over'. Together, they evolved to mean 'supervised in a careless manner'.