This character is a Other Letter and is mainly used in the Javanese script.
The glyph is not a composition. It has no designated width in East Asian texts. In bidirectional text it is written from left to right. When changing direction it is not mirrored. U+A99D forms an orthographic syllable in Brahmic scripts with similar characters, which prevents a line break inside it. The glyph can be confused with one other glyph.
The Wikipedia has the following information about this codepoint:
ꦝ is a syllable in Javanese script that represents the sound /ɖɔ/, /ɖa/. It is transliterated to Latin as "dha", and sometimes in Indonesian orthography as "dho". It has another form (pasangan), which is ◌꧀ꦝ, but represented by a single Unicode code point, U+A99D.
Representations
System
Representation (click value to copy)
Nº
43421
UTF-8
EA A6 9D
UTF-16
A9 9D
UTF-32
00 00 A9 9D
URL-Quoted
%EA%A6%9D
HTML hex reference
ꦝ
Wrong windows-1252 Mojibake
ê¦
Encoding: GB18030 (hex bytes)
82 37 92 34
RFC 5137
\u'A99D'
Bash and Zsh inside echo -e
\uA99D
C and C++
\uA99D
C#
\uA99D
CSS
\00A99D
Excel
=UNICHAR(43421)
Go
\uA99D
JavaScript
\uA99D
Modern JavaScript since ES6
\u{a99d}
JSON
\uA99D
Java
\uA99D
Lua
\u{A99D}
Matlab
char(43421)
Perl
"\x{A99D}"
PHP
\u{a99d}
PostgreSQL
U&'\A99D'
PowerShell
`u{A99D}
Python
\uA99D
Ruby
\u{a99d}
Rust
\u{a99d}
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