U+17B6 "ា" Khmer Vowel Sign Aa Unicode Character

Unicode Version 17.0

U+17B6 "ា" Khmer Vowel Sign Aa is a combining vowel mark used in the Khmer script, where it is written as a dependent diacritical symbol attached to a consonant to represent the long vowel sound "aa" (as in "father"). This character, known in Khmer as "ស្រៈ អា" (srak a), is a fundamental component of the Khmer writing system, altering the inherent vowel of a consonant from a short "a" (or "aw" in some contexts) to the emphasized long "aa" sound. It is classified under the Khmer block in the Unicode standard, and its proper rendering requires a base consonant to be visually combined with, appearing to the right of the consonant in horizontal writing. Without this vowel sign, many Khmer words would be pronounced differently or become ambiguous, highlighting its critical role in both the phonology and orthography of the Khmer language.

General Properties

Code Point U+17B6
Version Added 3.0
Name Khmer Vowel Sign Aa
Block Khmer
General Category Spacing Mark
Canonical Combining Class Not Reordered
Bidirectional Class Left To Right

Encodings

HTML Decimal Encoding ា
HTML Hex Encoding ា
UTF-8 Encoding 0xE1 0x9E 0xB6
UTF-16 Encoding 0x17B6
UTF-32 Encoding 0x000017B6
C/C++/Java Escape \u17b6

Unicode Properties

NFC Quick Check Yes
NFD Quick Check Yes
NFKC Quick Check Yes
NFKD Quick Check Yes
Numeric Type None
Numeric Value NaN
Line Break Complex Context Dependent (South East Asian)
Script Khmer
Script Extensions Khmer
Indic Syllabic Category Vowel Dependent
Indic Positional Category Right
ID Continue Yes
XID Continue Yes
Alphabetic Yes
Other Alphabetic Yes
Vertical Orientation Rotated
Grapheme Base Yes
Grapheme Cluster Break Spacing Mark
Word Break Extend
Sentence Break Extend