The correct spelling of the word is "office", pronounced /ˈɒfɪs/. The incorrect spelling "orefice" likely stems from mishearing or misremembering the pronunciation of the word. The phonetic transcription helps to understand how the word is spelled: the /ɒ/ sound represents the "o" in "office", and the /f/ sound is represented by the letter "f". The rest of the letters in the word follow fairly regular spelling patterns in English, but it's always important to double-check spelling to ensure accuracy.
The word "orefice" is a variant spelling of the term "orifice". The term "orifice" dates back to Middle English, borrowed from the Old French word "orifice", which ultimately derived from the Latin word "orificium". "Orificium" can be broken down into two Latin roots: "os" meaning "mouth" or "entrance", and "facere" meaning "to make" or "to do". Therefore, the literal translation of "orificium" is "to make a mouth" or "to make an entrance". Over time, the spelling and pronunciation of "orifice" evolved into its current form.