The word "Commandatory" is often misspelled as "Mandatory" due to their similar pronunciation. However, the correct spelling of "Commandatory" can be explained through its phonetic transcription: /kəˈmændətɔːri/. The stress falls on the second syllable, indicated by the schwa symbol, and it is followed by the distinct "mænd" sound. The ending "-atory" is commonly used in words of Latin origin, and it denotes a place, function, or role. Therefore, "Commandatory" refers to something that is required or ordered by authority.
Having the force of a command.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.