'unequally-shared' originates from the combination of 'unequal' and 'shared', where 'un-' is a prefix meaning 'not', 'equal' means 'the same in quantity, size, degree, or value', and 'shared' means 'used or enjoyed by more than one person'.

'unequal' and 'shared' were combined in modern English to form the compound adjective 'unequally-shared'.

Initially, 'unequal' meant 'not equal', and 'shared' meant 'divided among people'. The combination emphasizes the lack of equality in distribution.