'unevenly-built' originates from the combination of 'unevenly' and 'built'. 'Unevenly' comes from 'uneven', which originates from Old English 'unefen', where 'un-' meant 'not' and 'efen' meant 'even'. 'Built' is the past participle of 'build', which comes from Old English 'byldan', meaning 'to construct'.

'Unevenly-built' combines the adverb 'unevenly' and the past participle 'built' to describe a construction that is not level.

Initially, 'unevenly' meant 'not even', and 'built' meant 'constructed'. Together, they describe a structure that is not uniformly constructed.