words i've never been able to pronounce

Got any words that just give you fits? You know, words that no matter how hard you try, every time to attempt to say them, you never get it right. I like to mess with my four-year-old by asking him to say words like aluminum, spaghetti, and cinnamon. It's always funny to hear him butcher the human language. Well, if you ever want to have fun with me like that, just ask me to say ABOMINABLE or DEUTERONOMY and sometimes PARTICULARLY. I don't know why but I'll mispronounce those words at least as often as I pronounce them correctly.

So what about you? Got any words that kick your butt on a regular basis?