"Ileally" isn't a known word in the English language, thus its spelling cannot be explained through the International Phonetic Alphabet (IPA). Should you have meant "ideally", it is spelled /aɪˈdiːəli/ in IPA, with the primary emphasis on the second syllable. "Ideally" is an adverb used to describe something that is the best or most suitable possible. A common example of its use is: "Ideally, I would want to live by the beach."