U+1EE6 "Ủ" Latin Capital Letter U with Hook Above Unicode Character
Unicode Version 17.0
Ủ
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.
General Properties
| Code Point | U+1EE6 |
| Version Added | 1.1 |
| Name | Latin Capital Letter U with Hook Above |
| Block | Latin Extended Additional |
| General Category | Uppercase Letter |
| Canonical Combining Class | Not Reordered |
| Bidirectional Class | Left To Right |
| Decomposition Type | Canonical |
| Decomposition Mapping | "U" U+0055 Latin Capital Letter U "̉" U+0309 Combining Hook Above |
Encodings
| HTML Decimal Encoding | Ủ |
| HTML Hex Encoding | Ủ |
| UTF-8 Encoding | 0xE1 0xBB 0xA6 |
| UTF-16 Encoding | 0x1EE6 |
| UTF-32 Encoding | 0x00001EE6 |
| C/C++/Java Escape | \u1ee6 |
Unicode Properties
| NFC Quick Check | Yes |
| NFKC Quick Check | Yes |
| Numeric Type | None |
| Numeric Value | NaN |
| Line Break | Alphabetic |
| Uppercase | Yes |
| Simple Lowercase Code Point | "ủ" U+1EE7 Latin Small Letter U with Hook Above |
| Lowercase Code Point | "ủ" U+1EE7 Latin Small Letter U with Hook Above |
| Simple Case Folding | "ủ" U+1EE7 Latin Small Letter U with Hook Above |
| Case Folding | "ủ" U+1EE7 Latin Small Letter U with Hook Above |
| Cased | Yes |
| Changes When Casefolded | Yes |
| Changes When Casemapped | Yes |
| Changes When Lowercased | Yes |
| Changes When NFKC Casefolded | Yes |
| NFKC Casefold | "ủ" U+1EE7 Latin Small Letter U with Hook Above |
| NFKC Simple Casefold | "ủ" U+1EE7 Latin Small Letter U with Hook Above |
| Script | Latin |
| Script Extensions | Latin |
| Indic Syllabic Category | Other |
| ID Start | Yes |
| XID Start | Yes |
| ID Continue | Yes |
| XID Continue | Yes |
| Alphabetic | Yes |
| Vertical Orientation | Rotated |
| Grapheme Base | Yes |
| Grapheme Cluster Break | Other |
| Word Break | Alphabetic letter |
| Sentence Break | Upper |