U+FE99 "ﺙ" Arabic Letter Theh Isolated Form Unicode Character

U+FE99 "ﺙ" Arabic Letter Theh Isolated Form is a presentation form of the Arabic letter "theh" (ث), which is the fourth letter of the Arabic alphabet and represents the voiceless dental fricative sound "th" as in the English word "thin." This specific codepoint belongs to the Arabic Presentation Forms-B block and is used primarily for compatibility with legacy text encodings, as it depicts the letter in its isolated form, which occurs when it appears alone or at the end of a word after a non-connecting character. In modern Unicode text, the standard Arabic letter "ث" (U+062B) is preferred, but U+FE99 ensures correct visual rendering in systems that rely on older font or processing technologies.

General Properties

Code Point	U+FE99
Version Added	1.1
Name	Arabic Letter Theh Isolated Form
Unicode 1.0 Name	Glyph for Isolate Arabic Thaa
Block	Arabic Presentation Forms-B
General Category	Other Letter
Canonical Combining Class	Not Reordered
Bidirectional Class	Arabic Letter
Decomposition Type	Isolated
Decomposition Mapping	"ث" U+062B Arabic Letter Theh

Encodings

HTML Decimal Encoding	ﺙ
HTML Hex Encoding	ﺙ
UTF-8 Encoding	0xEF 0xBA 0x99
UTF-16 Encoding	0xFE99
UTF-32 Encoding	0x0000FE99
C/C++/Java Escape	\ufe99

Unicode Properties

NFC Quick Check	Yes
NFD Quick Check	Yes
Numeric Type	None
Numeric Value	NaN
Line Break	Alphabetic
Changes When NFKC Casefolded	Yes
NFKC Casefold	"ث" U+062B Arabic Letter Theh
NFKC Simple Casefold	"ث" U+062B Arabic Letter Theh
Script	Arabic
Script Extensions	Arabic
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	OLetter