'indifferently-built' originates from the English word 'indifferent,' which comes from the Latin word 'indifferens,' where 'in-' meant 'not' and 'differens' meant 'differing.'

'indifferens' transformed into the Old French word 'indifferent,' and eventually became the modern English word 'indifferent.'

Initially, it meant 'not differing or distinct,' but over time it evolved into its current meaning of 'lacking interest or care.'