'sloppily-maintained' originates from the English word 'sloppy,' which comes from the Middle English 'sloppe,' meaning 'muddy or slushy.' The suffix '-ly' is used to form adverbs, and 'maintained' is derived from the Latin 'manutenere,' meaning 'to hold in the hand.'

'sloppy' changed from the Middle English word 'sloppe' and eventually became the modern English word 'sloppy.' 'Maintained' evolved from the Latin 'manutenere' through Old French 'maintenir.'

Initially, 'sloppy' meant 'muddy or slushy,' but over time it evolved into its current meaning of 'careless or untidy.'