U+1DB6 "ᶶ" Modifier Letter Small U Bar Unicode Character

U+1DB6 "ᶶ" Modifier Letter Small U Bar is a superscript or modifier form of the letter "u" with a bar, specifically used in phonetic transcription to represent a high central rounded vowel, often in the International Phonetic Alphabet extension system. It is part of the "Phonetic Extensions" block and was added to Unicode to support precise notation in linguistics, particularly for diacritic-like modifications that indicate a sound’s roundedness and centralization. This character is typically employed in transcriptions where a smaller, raised version of the base letter is needed to modify a preceding consonant or vowel, allowing linguists to denote subtle articulatory details without full character resizing.

General Properties

Code Point	U+1DB6
Version Added	4.1
Name	Modifier Letter Small U Bar
Block	Phonetic Extensions Supplement
General Category	Modifier Letter
Canonical Combining Class	Not Reordered
Bidirectional Class	Left To Right
Decomposition Type	Super
Decomposition Mapping	"ʉ" U+0289 Latin Small Letter U Bar

Encodings

HTML Decimal Encoding	ᶶ
HTML Hex Encoding	ᶶ
UTF-8 Encoding	0xE1 0xB6 0xB6
UTF-16 Encoding	0x1DB6
UTF-32 Encoding	0x00001DB6
C/C++/Java Escape	\u1db6

Unicode Properties

NFC Quick Check	Yes
NFD Quick Check	Yes
Numeric Type	None
Numeric Value	NaN
Line Break	Alphabetic
Lowercase	Yes
Other Lowercase	Yes
Case Ignorable	Yes
Cased	Yes
Changes When NFKC Casefolded	Yes
NFKC Casefold	"ʉ" U+0289 Latin Small Letter U Bar
NFKC Simple Casefold	"ʉ" U+0289 Latin Small Letter U Bar
Script	Latin
Script Extensions	Latin
Indic Syllabic Category	Other
ID Start	Yes
XID Start	Yes
ID Continue	Yes
XID Continue	Yes
Diacritic	Yes
Alphabetic	Yes
Vertical Orientation	Rotated
Grapheme Base	Yes
Grapheme Cluster Break	Other
Word Break	Alphabetic letter
Sentence Break	Lower