disinterested - Dictionary definition and meaning for word disinterested
Dis-Interest...if a particular issue is not of any interest to me (dis-interest), i'll pass a biased free opinion about it...
Dis - Not + Interested. The Judge was not interested in the case, so he was not bothered about the outcome; he was disinterested and unprejudiced towards the case.
Disinterested = not having any self interest; unprejudiced