To intermediate means...hang on, that's the same thing, isn't it (though of course you can also use intermediate as an adjective to mean in-between).
So, disintermediate: that must mean to get yourself out of the way so that the opposing forces can smash each other to pieces, yes?
Well, not exactly. It's used in finance to describe getting rid of the middle men such as banks and brokers.
It might even be a good idea - but it's still a rubbish word.
Word Not To Use Today: disintermediate. This word comes from the Latin mediāre, to be in the middle.