U+1EE6 "Ủ" Latin Capital Letter U with Hook Above Unicode Character

U+1EE6 "Ủ" Latin Capital Letter U with Hook Above is a precomposed letter used primarily in the Vietnamese alphabet, where it represents the vowel sound /u/ pronounced with a falling then rising tonal contour known as the hỏi tone. The hook above diacritic is a distinctive mark that sits on top of the uppercase letter U, visually indicating this specific tonal quality, which is crucial for correct pronunciation and meaning in written Vietnamese. This character is distinct from the letter U with horn or other diacritical marks, and it is part of the Latin Extended Additional block in Unicode, supporting proper digital representation of the Vietnamese language.