The word "wister" is not frequently used, but its spelling can be tricky. It is pronounced as /ˈwɪstər/ with the "i" sound as in "win" and "e" as in "bet". The final "r" is pronounced, making it a two-syllable word. It is important to note that the spelling does not follow the traditional "r-controlled" vowel pattern, where the letter "r" changes the preceding vowel sound. Instead, it uses the "i-e" pattern seen in words like "mime" and "spine".