U+1F51 "ὑ" Greek Small Letter Upsilon with Dasia Unicode Character

U+1F51 "ὑ" Greek Small Letter Upsilon with Dasia is a historical Greek letter used in ancient and polytonic Greek orthography, where it represents the letter upsilon (υ) combined with a dasia, or rough breathing mark, placed above it. This diacritical mark indicates an initial aspiration, meaning the upsilon is pronounced with an "h" sound before it, as in the word "ὕδωρ" (hudōr, meaning water). It is part of the Unicode block for Greek and Coptic, and it is primarily employed in scholarly texts, biblical studies, and linguistic works to preserve the original pronunciation and accentuation of Classical Greek.

General Properties

Code Point	U+1F51
Version Added	1.1
Name	Greek Small Letter Upsilon with Dasia
Block	Greek Extended
General Category	Lowercase Letter
Canonical Combining Class	Not Reordered
Bidirectional Class	Left To Right
Decomposition Type	Canonical
Decomposition Mapping	"υ" U+03C5 Greek Small Letter Upsilon "̔" U+0314 Combining Reversed Comma Above

Encodings

HTML Decimal Encoding	ὑ
HTML Hex Encoding	ὑ
UTF-8 Encoding	0xE1 0xBD 0x91
UTF-16 Encoding	0x1F51
UTF-32 Encoding	0x00001F51
C/C++/Java Escape	\u1f51

Unicode Properties

NFC Quick Check	Yes
NFKC Quick Check	Yes
Numeric Type	None
Numeric Value	NaN
Line Break	Alphabetic
Lowercase	Yes
Simple Uppercase Code Point	"Ὑ" U+1F59 Greek Capital Letter Upsilon with Dasia
Simple Titlecase Code Point	"Ὑ" U+1F59 Greek Capital Letter Upsilon with Dasia
Uppercase Code Point	"Ὑ" U+1F59 Greek Capital Letter Upsilon with Dasia
Titlecase Code Point	"Ὑ" U+1F59 Greek Capital Letter Upsilon with Dasia
Cased	Yes
Changes When Casemapped	Yes
Changes When Titlecased	Yes
Changes When Uppercased	Yes
Script	Greek
Script Extensions	Greek
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	Lower