Words: arroyuelo (Spanish)

This is my favorite word to pronounce in Spanish because when I first ran across it in high school, I said "Whoa! That's a doozy." Try it complete with the rolled rr: arr-oy-ue-lo (arr-roy-way-loh) is how I pronounce it, but technically it could be arr-o-yue-lo (arr-ro-yeway-loh, with the third syllable pronounced as a tripthong, or three vowels in one syllable).