The word "asmus" is not commonly used in English, and its correct spelling may vary depending on its origin and context. However, if it is pronounced /ˈæzməs/, its spelling may be influenced by the Greek word "asthma," which refers to a respiratory condition characterized by breathing difficulty. In this case, the "s" may be used to replace the "th" sound, which is not present in some languages. Nonetheless, it is advisable to confirm the proper spelling of any word before using it in writing.