Home U+4E00 to U+9FFF CJK Unified Ideographs
Glyph for U+51F9
Source: Noto CJK

U+51F9 CJK Unified Ideo­graph-​51F9

U+51F9 was added in Unicode version 1.1 in 1993. It belongs to the block U+4E00 to U+9FFF CJK Unified Ideographs in the U+0000 to U+FFFF Basic Multilingual Plane.

This character is a Other Letter and is mainly used in the Han script. The Unihan Database defines it as concave, hollow, depressed; a pass, valley. Its Pīnyīn pronunciation is āo.

The glyph is not a composition. Its East Asian Width is wide. In bidirectional text it is written from left to right. When changing direction it is not mirrored. U+51F9 offers a line break opportunity at its position, except in some numeric contexts.

Representations

System Representation
Nº 20985
UTF-8 E5 87 B9
UTF-16 51 F9
UTF-32 00 00 51 F9
URL-Quoted %E5%87%B9
HTML hex reference 凹
Wrong windows-1252 Mojibake 凹
Encoding: EUC-KR (hex bytes) E8 EA
Encoding: JIS0208 (hex bytes) B1 FA
Pīnyīn āo

Elsewhere

Complete Record

Property Value
Age (age) 1.1 (1993)
Unicode Name (na) CJK UNIFIED IDEOGRAPH-51F9
Unicode 1 Name (na1) —
Block (blk) CJK Unified Ideographs
General Category (gc) Other Letter
Script (sc) Han
Bidirectional Category (bc) Left To Right
Combining Class (ccc) Not Reordered
Decomposition Type (dt) none
Decomposition Mapping (dm) Glyph for U+51F9 CJK Unified Ideograph-51F9
Lowercase (Lower) ✘
Simple Lowercase Mapping (slc) Glyph for U+51F9 CJK Unified Ideograph-51F9
Lowercase Mapping (lc) Glyph for U+51F9 CJK Unified Ideograph-51F9
Uppercase (Upper) ✘
Simple Uppercase Mapping (suc) Glyph for U+51F9 CJK Unified Ideograph-51F9
Uppercase Mapping (uc) Glyph for U+51F9 CJK Unified Ideograph-51F9
Simple Titlecase Mapping (stc) Glyph for U+51F9 CJK Unified Ideograph-51F9
Titlecase Mapping (tc) Glyph for U+51F9 CJK Unified Ideograph-51F9
Case Folding (cf) Glyph for U+51F9 CJK Unified Ideograph-51F9
ASCII Hex Digit (AHex) ✘
Alphabetic (Alpha) ✔
Bidi Control (Bidi_C) ✘
Bidi Mirrored (Bidi_M) ✘
Composition Exclusion (CE) ✘
Case Ignorable (CI) ✘
Changes When Casefolded (CWCF) ✘
Changes When Casemapped (CWCM) ✘
Changes When NFKC Casefolded (CWKCF) ✘
Changes When Lowercased (CWL) ✘
Changes When Titlecased (CWT) ✘
Changes When Uppercased (CWU) ✘
Cased (Cased) ✘
Full Composition Exclusion (Comp_Ex) ✘
Default Ignorable Code Point (DI) ✘
Dash (Dash) ✘
Deprecated (Dep) ✘
Diacritic (Dia) ✘
Emoji Modifier Base (EBase) ✘
Emoji Component (EComp) ✘
Emoji Modifier (EMod) ✘
Emoji Presentation (EPres) ✘
Emoji (Emoji) ✘
Extender (Ext) ✘
Extended Pictographic (ExtPict) ✘
FC NFKC Closure (FC_NFKC) Glyph for U+51F9 CJK Unified Ideograph-51F9
Grapheme Cluster Break (GCB) Any
Grapheme Base (Gr_Base) ✔
Grapheme Extend (Gr_Ext) ✘
Grapheme Link (Gr_Link) ✘
Hex Digit (Hex) ✘
Hyphen (Hyphen) ✘
ID Continue (IDC) ✔
ID Start (IDS) ✔
IDS Binary Operator (IDSB) ✘
IDS Trinary Operator and (IDST) ✘
IDSU (IDSU) 0
ID_Compat_Math_Continue (ID_Compat_Math_Continue) 0
ID_Compat_Math_Start (ID_Compat_Math_Start) 0
Ideographic (Ideo) ✔
InCB (InCB) None
Indic Mantra Category (InMC) —
Indic Positional Category (InPC) NA
Indic Syllabic Category (InSC) Other
Jamo Short Name (JSN) —
Join Control (Join_C) ✘
Logical Order Exception (LOE) ✘
Math (Math) ✘
Noncharacter Code Point (NChar) ✘
NFC Quick Check (NFC_QC) Yes
NFD Quick Check (NFD_QC) Yes
NFKC Casefold (NFKC_CF) Glyph for U+51F9 CJK Unified Ideograph-51F9
NFKC Quick Check (NFKC_QC) Yes
NFKC_SCF (NFKC_SCF) Glyph for U+51F9 CJK Unified Ideograph-51F9
NFKD Quick Check (NFKD_QC) Yes
Other Alphabetic (OAlpha) ✘
Other Default Ignorable Code Point (ODI) ✘
Other Grapheme Extend (OGr_Ext) ✘
Other ID Continue (OIDC) ✘
Other ID Start (OIDS) ✘
Other Lowercase (OLower) ✘
Other Math (OMath) ✘
Other Uppercase (OUpper) ✘
Prepended Concatenation Mark (PCM) ✘
Pattern Syntax (Pat_Syn) ✘
Pattern White Space (Pat_WS) ✘
Quotation Mark (QMark) ✘
Regional Indicator (RI) ✘
Radical (Radical) ✘
Sentence Break (SB) Other Letter
Soft Dotted (SD) ✘
Sentence Terminal (STerm) ✘
Terminal Punctuation (Term) ✘
Unified Ideograph (UIdeo) ✔
Variation Selector (VS) ✘
Word Break (WB) Other
White Space (WSpace) ✘
XID Continue (XIDC) ✔
XID Start (XIDS) ✔
Expands On NFC (XO_NFC) ✘
Expands On NFD (XO_NFD) ✘
Expands On NFKC (XO_NFKC) ✘
Expands On NFKD (XO_NFKD) ✘
Bidi Paired Bracket (bpb) Glyph for U+51F9 CJK Unified Ideograph-51F9
Bidi Paired Bracket Type (bpt) None
East Asian Width (ea) wide
Hangul Syllable Type (hst) Not Applicable
ISO 10646 Comment (isc) —
Joining Group (jg) No_Joining_Group
Joining Type (jt) Non Joining
Line Break (lb) Ideographic
Numeric Type (nt) none
Numeric Value (nv) not a number
Simple Case Folding (scf) Glyph for U+51F9 CJK Unified Ideograph-51F9
Script Extension (scx)
Vertical Orientation (vo) U
Big Five Mapping (kBigFive) A557
CCCII Mapping (kCCCII) 21334C
CNS 11643-1986 Mapping (kCNS1986) 1-4577
CNS 11643-1992 Mapping (kCNS1992) 1-4577
Cangjie Input Code (kCangjie) SSU
kCantonese (kCantonese) aau3
kCihaiT (kCihaiT) 171.601
kCowles (kCowles) 30 2860
kDaeJaweon (kDaeJaweon) 0301.060
Unihan Definition (kDefinition) concave, hollow, depressed; a pass, valley
kEACC (kEACC) 21334C
kFenn (kFenn) 650G
kFennIndex (kFennIndex) 589.09 617.02
kFourCornerCode (kFourCornerCode) 7777.0
kFrequency (kFrequency) 5
kGB0 (kGB0) 1628
kGB1 (kGB1) 1628
kGradeLevel (kGradeLevel) 4
kHKGlyph (kHKGlyph) 0320
kHanYu (kHanYu) 10308.030
kHangul (kHangul) 요:0N
kHanyuPinlu (kHanyuPinlu) āo(31)
kHanyuPinyin (kHanyuPinyin) 10308.030:āo,wā
kIICore (kIICore) AGTJHKMP
kIRGDaeJaweon (kIRGDaeJaweon) 0301.060
kIRGHanyuDaZidian (kIRGHanyuDaZidian) 10308.030
kIRGKangXi (kIRGKangXi) 0135.100
kIRG_GSource (kIRG_GSource) G0-303C
kIRG_HSource (kIRG_HSource) HB1-A557
kIRG_JSource (kIRG_JSource) J0-317A
kIRG_KPSource (kIRG_KPSource) KP0-F9FD
kIRG_KSource (kIRG_KSource) K0-686A
kIRG_TSource (kIRG_TSource) T1-4577
kIRG_VSource (kIRG_VSource) V2-8A4D
kJapanese (kJapanese) オウ ヨウ くぼむ へこむ ぼこ
kJapaneseKun (kJapaneseKun) KUBOMU KUBOMI
kJapaneseOn (kJapaneseOn) OU
kJis0 (kJis0) 1790
kJoyoKanji (kJoyoKanji) 2010
kKangXi (kKangXi) 0135.100
kKorean (kKorean) YO
kKoreanName (kKoreanName) 2015
kLau (kLau) 2272
kMainlandTelegraph (kMainlandTelegraph) 0425
kMandarin (kMandarin) āo
kMatthews (kMatthews) 7268
kMeyerWempe (kMeyerWempe) 23 1968
kMojiJoho (kMojiJoho) MJ007441
kMorohashi (kMorohashi) 01810
kNelson (kNelson) 0664
kPhonetic (kPhonetic) 5
Radical Stroke Count (Adobe Japan 1-6) (kRSAdobe_Japan1_6) C+1308+17.2.3
Radical Stroke Count (Unicode) (kRSUnicode) 17.3
kSBGY (kSBGY) 544.15
kSMSZD2003Index (kSMSZD2003Index) 55.02
kSMSZD2003Readings (kSMSZD2003Readings) āo粵aau3,nap1 wā粵waa1
Semantic Variant (kSemanticVariant) Glyph for U+20544 U+20544
kTGH (kTGH) 2013:260
kTGHZ2013 (kTGHZ2013) 004.130:āo
Taiwanese Telegraph Code (kTaiwanTelegraph) 0425
Stroke Number (kTotalStrokes) 5
UnihanCore2020 Set (kUnihanCore2020) GHJKMPT
kXHC1983 (kXHC1983) 0011.030:āo 1176.060:wā
Xerox Code (kXerox) 256:076