The spelling of the word "addibility" can be broken down phonetically as /əˈdɪbəlɪti/. The first syllable is pronounced with a short "uh" sound, followed by a stressed "ih" sound in the second syllable. The following three letters represent the root word "add," pronounced as "ad" with a short "a" sound. The final three letters are the suffix "-ibility," pronounced as "uh-bil-i-tee." Altogether, the word refers to the ability to be added or combined.