U+1ECF "ỏ" Latin Small Letter O with Hook Above Unicode Character

U+1ECF "ỏ" Latin Small Letter O with Hook Above is a specialized grapheme used primarily in the Vietnamese alphabet, where it represents the sound of the letter "o" pronounced with a low-rising or questioning tone, known as the hỏi tone. This diacritical mark, a small hook placed above the letter, distinguishes it from other tonal variations of "o" in Vietnamese, such as "ò" (with a grave accent) or "ó" (with an acute accent), and is essential for accurate spelling and pronunciation in the language. The character is encoded in the Unicode Latin Extended Additional block and is typically input through specialized keyboard layouts or character pickers.

General Properties

Code Point	U+1ECF
Version Added	1.1
Name	Latin Small Letter O with Hook Above
Block	Latin Extended Additional
General Category	Lowercase Letter
Canonical Combining Class	Not Reordered
Bidirectional Class	Left To Right
Decomposition Type	Canonical
Decomposition Mapping	"o" U+006F Latin Small Letter O "̉" U+0309 Combining Hook Above

Encodings

HTML Decimal Encoding	ỏ
HTML Hex Encoding	ỏ
UTF-8 Encoding	0xE1 0xBB 0x8F
UTF-16 Encoding	0x1ECF
UTF-32 Encoding	0x00001ECF
C/C++/Java Escape	\u1ecf

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	"Ỏ" U+1ECE Latin Capital Letter O with Hook Above
Simple Titlecase Code Point	"Ỏ" U+1ECE Latin Capital Letter O with Hook Above
Uppercase Code Point	"Ỏ" U+1ECE Latin Capital Letter O with Hook Above
Titlecase Code Point	"Ỏ" U+1ECE Latin Capital Letter O with Hook Above
Cased	Yes
Changes When Casemapped	Yes
Changes When Titlecased	Yes
Changes When Uppercased	Yes
Script	Latin
Script Extensions	Latin
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