The word "aspiratory" refers to anything related to aspiration or the act of inhaling. Its spelling can be explained using the International Phonetic Alphabet (IPA), which represents each sound in the word. "As-PIR-a-to-ry" is pronounced as /əˈspaɪrətɔːri/. This means that the first syllable is pronounced with an unstressed schwa vowel sound followed by a stressed "aɪ" diphthong. The second syllable has a long "ɔː" vowel sound, and the word ends with a reduced vowel sound /i/.
Pert. to breathing.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.