The word "porteous" is spelled with a silent "e" at the end, which means it's pronounced as /pɔːtɪəs/ rather than /pɔːtiəs/. The "ou" in the middle is pronounced as /uː/, like in "group" or "soup". This word is a name of Scottish origin and is often used as a surname. When spelling the word "porteous", it is important to remember to include the silent "e" at the end in order to properly pronounce the word.