The word "spadicifioral" is a tricky one to spell. Due to its unusual combination of sounds, it can be difficult to know where to place each letter. The word is pronounced /spəˈdɪsɪfjɔrəl/ which helps to explain its spelling. The "i" after the "s" becomes a syllable on its own, leading to the double "s" and "f". The "c" is added to aid pronunciation and the final "al" suffix is added to indicate that it is an adjective.