The correct spelling of the word "extended" is [ɪkˈstɛndɪd]. It includes the short "e" sound, an "x" sound, a stressed "t" sound, and a final "d" sound. This word is often misspelled as "ex tended", with a space between "ex" and "tended". However, this incorrect spelling separates the prefix "ex-" meaning "out" or "beyond" from the root word "tended." The correct spelling preserves the integrity of the word's meaning and pronunciation.
The word extended comes from the Latin word extendere, which is a combination of ex (meaning out or beyond) and tendere (meaning to stretch or to extend). The term was later borrowed into Middle English from Old French as extenden, and eventually evolved into its modern spelling and pronunciation as extended.