U+31B1 "ㆱ" Bopomofo Letter Om Unicode Character

Unicode Version 17.0

U+31B1 "ㆱ" Bopomofo Letter Om is a relatively rare phonetic symbol used in the Bopomofo (or Zhuyin Fuhao) system, which is employed primarily in Taiwan to annotate the pronunciation of Mandarin Chinese characters, particularly for educational purposes and input methods. This specific letter represents the sound of a closed back rounded vowel, similar to the "o" in "go," but with a more precise and specialized phonetic value within the broader Bopomofo set. Unlike more common Bopomofo letters, "Om" is not frequently encountered in standard Mandarin instruction, as it is typically reserved for transcribing dialectal sounds or the exact pronunciation of certain characters in linguistic contexts. Its inclusion in the Unicode standard ensures that digital text systems can accurately represent this nuanced phonetic notation, preserving the ability to encode specialized linguistic data without loss of fidelity.

General Properties

Code Point U+31B1
Version Added 3.0
Name Bopomofo Letter Om
Block Bopomofo Extended
General Category Other Letter
Canonical Combining Class Not Reordered
Bidirectional Class Left To Right

Encodings

HTML Decimal Encoding ㆱ
HTML Hex Encoding ㆱ
UTF-8 Encoding 0xE3 0x86 0xB1
UTF-16 Encoding 0x31B1
UTF-32 Encoding 0x000031B1
C/C++/Java Escape \u31b1

Unicode Properties

NFC Quick Check Yes
NFD Quick Check Yes
NFKC Quick Check Yes
NFKD Quick Check Yes
Numeric Type None
Numeric Value NaN
Line Break Ideographic
East Asian Width Wide
Script Bopomofo
Script Extensions Bopomofo
Indic Syllabic Category Other
ID Start Yes
XID Start Yes
ID Continue Yes
XID Continue Yes
Alphabetic Yes
Vertical Orientation Upright
Grapheme Base Yes
Grapheme Cluster Break Other
Word Break Alphabetic letter
Sentence Break OLetter