The spelling of the word "opperman" can be a bit confusing due to its uncommon usage. However, the correct spelling of this word is "opman". The phonetic transcription for "opman" is /ˈɑp.mən/. The word is of Dutch origin and refers to a person who works in a warehouse or a dockyard. It derives from the Dutch word "opslagman" which means "storekeeper" or "warehouseman". It is important to use the correct spelling when using this word to avoid confusion or misinterpretation.