Here's why:
* Schwa sound: The schwa sound is a very short, unstressed vowel sound, often represented by the symbol "ə". It's the most common vowel sound in English. Examples include the "a" in "about" or the "e" in "taken".
* "u" in "another": The "u" in "another" makes a distinct vowel sound, similar to the "u" in "but" or "sun". This sound is often called a "short u" sound.
So, the "u" in "another" does not have the schwa sound.