The spelling of the word "ruia" may seem confusing to some, but it can be explained using the International Phonetic Alphabet (IPA). In IPA, the first syllable "rui" is pronounced with a "r-oo-ee" sound, with the stress on the second syllable. The second syllable "a" is pronounced as the schwa sound, which is represented as "ə". Thus, the correct IPA transcription for "ruia" is /'ru.i.ə/ . By understanding the phonetics behind the spelling, one can confidently pronounce and spell the word "ruia".