'haphazardly-ended' originates from the combination of 'haphazardly' and 'ended'. 'Haphazardly' comes from 'haphazard', which originates from the Middle English word 'hap', meaning 'chance', and 'hazard', meaning 'risk'. 'Ended' is the past participle of 'end', which comes from the Old English 'endian', meaning 'to bring to a conclusion'.

'Haphazardly' evolved from 'hap' and 'hazard', while 'ended' evolved from 'endian'. The combination of these words formed the modern term 'haphazardly-ended'.

Initially, 'haphazard' meant 'by chance', and 'end' meant 'to conclude'. The combination now implies a conclusion reached without planning.