Korean · Pronunciation Guide
Written 의, but as the possessive particle it is standardly said 'e', exactly like 에. The full 'ui' pronunciation belongs to other positions in the word.
ui
A single unstressed beat that attaches to the noun in front and never stands alone. What matters here is not rhythm but the three-way split in how ㅢ is read: 'ui' in a word-initial syllable, 'i' in a non-initial one, and 'e' when it is this possessive particle.
Listen: 의
Free browser voice. Hear it read by a real native speaker inside the LingoDrop app.
이것은 민수의 책이에요.
Igeoseun Minsuui chaegieyo.
This is Minsu's book.
Listen: 이것은 민수의 책이에요.
Free browser voice. Hear it read by a real native speaker inside the LingoDrop app.
이것은 민수의 책이에요 romanizes the particle as 'ui', but almost every speaker says Min-su-e chae-gi-e-yo. Notice too that 책이에요 shifts the ㄱ of 책 forward into the vowel, so a consonant that would otherwise be silent turns into an audible g.
Reading it as a careful two-part 'oo-ee' is the textbook version and sounds like one. In the possessive slot it is simply 'e'. The related error is hearing ㅢ as English 'wee' -- there is no lip rounding anywhere in this vowel, and rounding it produces 위 instead, which is a different word entirely.