'unevenly-joined' originates from the combination of 'unevenly' and 'joined', where 'unevenly' is derived from 'uneven', meaning 'not level or smooth', and 'joined' from 'join', meaning 'to connect or fasten together'.

'Unevenly-joined' combines the adverb 'unevenly' with the past participle 'joined', forming a compound adjective.

Initially, 'unevenly' meant 'not evenly', and 'joined' meant 'connected'. Together, they describe something that is not smoothly connected.