'sloppily-constructed' originates from the adverb 'sloppily' and the past participle 'constructed'. 'Sloppily' comes from 'sloppy', which is derived from the word 'slop', meaning 'muddy or wet'. 'Constructed' comes from Latin 'constructus', the past participle of 'construere', meaning 'to build'.

'Sloppy' evolved from Middle English 'slop', which referred to a loose outer garment, and later took on the meaning of 'careless'. 'Constructed' has remained relatively unchanged from its Latin roots.

Initially, 'sloppy' referred to something loose or untidy, and 'constructed' meant 'built'. Together, they now describe something built in a careless manner.