'vaguely-changed' originates from the combination of 'vaguely' and 'changed', where 'vaguely' means 'in a way that is not clear' and 'changed' means 'made different'.

'vaguely' and 'changed' were combined in modern English to form the compound adjective 'vaguely-changed'.

Initially, 'vaguely' meant 'in a way that is not clear', and 'changed' meant 'made different'. The compound form retains these meanings.