To get back on topic as per the request of the mighty pshrynk, I think I would use the word more often outside of MR if I knew that I was pronouncing it correctly. I've heard it through a translation website, but the person speaks it so quickly that it is still unclear to me and that's even with the 2 years of French classes I took in college.
I have taken to pronouncing it as *li-zues (like the mythological god)*. But don't quote me on that as I must admit to being question on a rather frequent basis as to "where are you from". Living in the "almost South" with a strong Chicagoan accent has that affect on people.