U+1EC9 "ỉ" Latin Small Letter I with Hook Above Unicode Character
U+1EC9 "ỉ" Latin Small Letter I with Hook Above is a specialized grapheme used primarily in the Vietnamese language's romanized alphabet, known as Chữ Quốc Ngữ, where it represents the vowel i with a falling-rising or "hỏi" tone. This diacritical mark, a hook above the letter, indicates a specific tonal contour distinct from the flat, rising, or falling tones of other Vietnamese vowels. In practical terms, this character appears in Vietnamese words like "ỉ" (meaning to whine or complain) or in compounds such as "ỉa" as part of informal or regional vocabulary. It thus plays a crucial role in the accurate representation of spoken Vietnamese in written form, enabling readers to correctly pronounce and interpret the tonal nuances that are fundamental to the language's meaning.
General Properties
| Code Point | U+1EC9 |
| Version Added | 1.1 |
| Name | Latin Small Letter I with Hook Above |
| Block | Latin Extended Additional |
| General Category | Lowercase Letter |
| Canonical Combining Class | Not Reordered |
| Bidirectional Class | Left To Right |
| Decomposition Type | Canonical |
| Decomposition Mapping | "i" U+0069 Latin Small Letter I "̉" U+0309 Combining Hook Above |
Encodings
| HTML Decimal Encoding | ỉ |
| HTML Hex Encoding | ỉ |
| UTF-8 Encoding | 0xE1 0xBB 0x89 |
| UTF-16 Encoding | 0x1EC9 |
| UTF-32 Encoding | 0x00001EC9 |
| C/C++/Java Escape | \u1ec9 |
Unicode Properties
| NFC Quick Check | Yes |
| NFKC Quick Check | Yes |
| Numeric Type | None |
| Numeric Value | NaN |
| Line Break | Alphabetic |
| Lowercase | Yes |
| Simple Uppercase Code Point | "Ỉ" U+1EC8 Latin Capital Letter I with Hook Above |
| Simple Titlecase Code Point | "Ỉ" U+1EC8 Latin Capital Letter I with Hook Above |
| Uppercase Code Point | "Ỉ" U+1EC8 Latin Capital Letter I with Hook Above |
| Titlecase Code Point | "Ỉ" U+1EC8 Latin Capital Letter I with Hook Above |
| Cased | Yes |
| Changes When Casemapped | Yes |
| Changes When Titlecased | Yes |
| Changes When Uppercased | Yes |
| 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 | Lower |