The spelling of "more threesided" can be a bit confusing at first glance. The correct pronunciation is /mɔr ˈθriː.saɪdɪd/. The word "more" is spelled as usual, but "threesided" is spelled with two "e's" because the base word "three" already ends with an "e". Additionally, the "s" in "sided" becomes a "z" sound due to the addition of the suffix "-ed". Therefore, "more threesided" refers to an object or shape that has three sides, but more of them than usual.