"Uninterested" vuol dire non avere nessuna interesse in qualcosa, essere annoiato, non essere stimolato. Invece "disinterested " significa non prendere parte, imparziale. Es. I was uninterested in the conversation because it was about politics and I find that very boring". Es. The judge and jury in a courtroom must be disinterested in the case, to be able to make a fair verdict.