U+1F31 "ἱ" Greek Small Letter Iota with Dasia Unicode Character
Unicode Version 17.0
ἱ
U+1F31 "ἱ" Greek Small Letter Iota with Dasia is a polytonic Greek letter that represents the vowel iota combined with the dasia or rough breathing mark. This diacritical mark indicates an initial aspiration, meaning the character is pronounced with an 'h' sound before the vowel, similar to the English 'hi' or the Greek letter eta with rough breathing. Historically used in ancient and medieval Greek texts, this character appears in words where the iota begins a syllable or word and requires aspiration, such as in certain forms of the verb "ἱστορέω" meaning to inquire or to narrate. It is part of the Unicode Greek Extended block and is encoded for the accurate representation of classical Greek orthography.
General Properties
| Code Point | U+1F31 |
| Version Added | 1.1 |
| Name | Greek Small Letter Iota with Dasia |
| Block | Greek Extended |
| General Category | Lowercase Letter |
| Canonical Combining Class | Not Reordered |
| Bidirectional Class | Left To Right |
| Decomposition Type | Canonical |
| Decomposition Mapping | "ι" U+03B9 Greek Small Letter Iota "̔" U+0314 Combining Reversed Comma Above |
Encodings
| HTML Decimal Encoding | ἱ |
| HTML Hex Encoding | ἱ |
| UTF-8 Encoding | 0xE1 0xBC 0xB1 |
| UTF-16 Encoding | 0x1F31 |
| UTF-32 Encoding | 0x00001F31 |
| C/C++/Java Escape | \u1f31 |
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 | "Ἱ" U+1F39 Greek Capital Letter Iota with Dasia |
| Simple Titlecase Code Point | "Ἱ" U+1F39 Greek Capital Letter Iota with Dasia |
| Uppercase Code Point | "Ἱ" U+1F39 Greek Capital Letter Iota with Dasia |
| Titlecase Code Point | "Ἱ" U+1F39 Greek Capital Letter Iota with Dasia |
| Cased | Yes |
| Changes When Casemapped | Yes |
| Changes When Titlecased | Yes |
| Changes When Uppercased | Yes |
| Script | Greek |
| Script Extensions | Greek |
| 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 |