It's pronounced like in-or. Not in-ury, eye-nur, eee-nur, in-yeur, in-oir, insure, injure, or manure, which is what everyone keeps calling me on the VC.

Also, the word isn't a play on the hack software Iniuria, nor is it taken from the common definition of getting habituated to something unpleasant. It comes from an old legal term that means to start something, or to have something enacted and come into effect. Conversely, though, you could always think of it as deriving from a more colloquial origin, where its based off the saying, "In ur mother," because that is exactly where I will be tonight.