The correct spelling of the word is "courteous", which is pronounced /ˈkɔːtɪəs/. The word is derived from the Old French word "curteis", meaning refined, polite or courtly. The spelling "curteus" is incorrect and may be a result of misspelling or confusion with similar sounding words. It is important to use the correct spelling in written communication to avoid confusion and convey a professional image.
The word "curteus" comes from the Old French term "curteis", which was derived from the Vulgar Latin word "co(u)rtēsus". It ultimately originates from the Latin word "cōrtem" or "cōrs", meaning "court" or "enclosure". The term "curteus" was used to describe someone who possessed the qualities or manners associated with courtly behavior, such as politeness, graciousness, and respect. Over time, the word evolved in meaning and spelling to become "courteous" in English.