Does something bore you to tears? Do you have absolutely no interest in it? Then it's uninterested you're thinking of. When you couldn't care less. That's when to use uninterested.
|As cool as it looks, you'd probably still be|
uninterested in watching this paint dry.
Though the dis- prefix is often used for antonyms, disinterested is not the opposite of interested. If you are not interested in something, that does not make you disinterested. Disinterested is being impartial and having no bias.
If this is still too difficult for you, disinterested can be thought of as meaning impartial, unbiased or even uninvested. Uninterested can be thought of as indifferent, as in not caring.
If you're ever unfortunate enough to end up in a bar brawl, then pray the police dealing with your case are disinterested and not uninterested!
|It doesn't matter how cool your car is.|
A good policeman is always disinterested.