The correct spelling of the word "rudasill" is [ruh-duh-sil]. The first syllable, "ruh," is pronounced with the short "u" sound, like in "hut." The second syllable, "da," uses the short "a" sound, like in "cat." Finally, the third syllable, "sil," has a long "i" sound and ends with a double "l" for emphasis. It's important to pay attention to the IPA transcription when learning the spelling of words, as it can help ensure accurate pronunciation and spelling.