'sluggishly-built' originates from the English word 'sluggish,' which comes from Middle English 'sluggi,' meaning 'slow or lazy,' combined with 'built,' from Old English 'byldan,' meaning 'to construct.'

'sluggish' evolved from Middle English 'sluggi' and combined with 'built' from Old English 'byldan' to form the modern term 'sluggishly-built.'

Initially, 'sluggish' meant 'slow or lazy,' and 'built' meant 'to construct.' Together, they describe something constructed in a slow manner.