The spelling of "avellara" can be explained using the International Phonetic Alphabet (IPA). The first syllable "a-" is pronounced as the vowel sound in "father" /ɑ/ while the second syllable "-vel" has a short "e" sound /ɛ/. The final syllable "-lara" is pronounced with a long "a" sound /eɪ/ and a rolling "r" /r/. Therefore, the correct spelling of this word can be written as /ə'vɛlɑːrə/. It is important to use IPA to ensure proper pronunciation and understanding of words.