I’m talking about the capital of South Korea.
I’ve always pronounced it as “sole” - a single syllable that rhymes with hole. This is how I’ve heard it pronounced.
But I was listening to an audio book this week and the reader pronounced it “sool” - it sounded like it rhymed with pool or maybe jewel. It wasn’t clear if he was pronouncing it as one syllable or two.
I figured he might be wrong. But his reading was presumably being checked by somebody so I figured maybe he was right and I’ve been wrong all these years.
I checked on Wikipedia and Google. I found that most people seemed to use the same pronunciation I do. But a few do seem to stretch the vowel sound, making the word into two syllables. And that seems to be the way Koreans pronounce it.