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Source: Noto Sans Arabic

U+0651 Arabic Shadda

U+0651 was added in Unicode version 1.1 in 1993. It belongs to the block U+0600 to U+06FF Arabic in the U+0000 to U+FFFF Basic Multilingual Plane.

This character is a Nonspacing Mark and inherits its script property from the preceding character. It is also used in the scripts Arabic, Syriac.

The glyph is not a composition. It has no designated width in East Asian texts. In bidirectional text it acts as Nonspacing Mark. When changing direction it is not mirrored. U+0651 prohibits a line break before it. The glyph can be confused with 9 other glyphs.

The Wikipedia has the following information about this codepoint:

Shaddah (Arabic: شَدّة shaddah [ˈʃæd.dæ], "[sign of] emphasis", also called by the verbal noun from the same root, tashdid تشديد tashdīd "emphasis") is one of the diacritics used with the Arabic alphabet, indicating a geminated consonant. It is functionally equivalent to writing a consonant twice in the orthographies of languages like Latin, Italian, Swedish, and Ancient Greek, and is thus rendered in Latin script in most schemes of Arabic transliteration, e.g. رُمّان = rummān 'pomegranates'.

Representations

System	Representation
Nº	1617
UTF-8	D9 91
UTF-16	06 51
UTF-32	00 00 06 51
URL-Quoted	%D9%91
HTML hex reference	ّ
Wrong windows-1252 Mojibake	â—ŒÙ‘
Encoding: ISO-8859-6 (hex bytes)	F1
Encoding: WINDOWS-1256 (hex bytes)	F8
Adobe Glyph List	afii57457
Adobe Glyph List	shaddaarabic
digraph	3+

Related Characters

Confusables

Arabic Ligature Shadda with Dammatan Isolated Form

Arabic Ligature Shadda with Kasratan Isolated Form

Arabic Ligature Shadda with Fatha Medial Form

Arabic Ligature Shadda with Fatha Isolated Form

Arabic Ligature Shadda with Damma Medial Form

Arabic Ligature Shadda with Damma Isolated Form

Arabic Ligature Shadda with Kasra Medial Form

Arabic Ligature Shadda with Kasra Isolated Form

Arabic Ligature Allah Isolated Form

Elsewhere

Complete Record

Property	Value
Age (age)	1.1 (1993)
Unicode Name (na)	ARABIC SHADDA
Unicode 1 Name (na1)	ARABIC SHADDAH
Block (blk)	Arabic
General Category (gc)	Nonspacing Mark
Script (sc)	Inherited
Bidirectional Category (bc)	Nonspacing Mark
Combining Class (ccc)	Ccc33
Decomposition Type (dt)	none
Decomposition Mapping (dm)	Arabic Shadda
Lowercase (Lower)	✘
Simple Lowercase Mapping (slc)	Arabic Shadda
Lowercase Mapping (lc)	Arabic Shadda
Uppercase (Upper)	✘
Simple Uppercase Mapping (suc)	Arabic Shadda
Uppercase Mapping (uc)	Arabic Shadda
Simple Titlecase Mapping (stc)	Arabic Shadda
Titlecase Mapping (tc)	Arabic Shadda
Case Folding (cf)	Arabic Shadda
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)	Arabic Shadda
Grapheme Cluster Break (GCB)	Extend
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)	Extend
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)	Arabic Shadda
NFKC Quick Check (NFKC_QC)	Yes
NFKC_SCF (NFKC_SCF)	Arabic Shadda
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)	Extend
Soft Dotted (SD)	✘
Sentence Terminal (STerm)	✘
Terminal Punctuation (Term)	✘
Unified Ideograph (UIdeo)	✘
Variation Selector (VS)	✘
Word Break (WB)	Extend
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)	Arabic Shadda
Bidi Paired Bracket Type (bpt)	None
East Asian Width (ea)	neutral
Hangul Syllable Type (hst)	Not Applicable
ISO 10646 Comment (isc)	—
Joining Group (jg)	No_Joining_Group
Joining Type (jt)	Transparent
Line Break (lb)	Combining Mark
Numeric Type (nt)	none
Numeric Value (nv)	not a number
Simple Case Folding (scf)	Arabic Shadda
Script Extension (scx)	Arabic Syriac
Vertical Orientation (vo)	R