This character is a Other Letter and is mainly used in the Limbu 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. The word that U+1908 forms with similar adjacent characters prevents a line break inside it.
El Wikipedia tiene la siguiente información acerca de este punto de código:
The Limbu script (also Sirijanga script) is used to write the Limbu language. It is a Brahmic type abugida.
Representaciones
Sistema
Representación (click value to copy)
N.º
6408
UTF-8
E1 A4 88
UTF-16
19 08
UTF-32
00 00 19 08
URL-Quoted
%E1%A4%88
HTML hex reference
ᤈ
Mojibake mal de windows-1252
ᤈ
Codificación: GB18030 (hexadecimales bytes)
81 34 ED 32
RFC 5137
\u'1908'
Bash and Zsh inside echo -e
\u1908
C and C++
\u1908
C#
\u1908
CSS
\001908
Excel
=UNICHAR(6408)
Go
\u1908
JavaScript
\u1908
Modern JavaScript since ES6
\u{1908}
JSON
\u1908
Java
\u1908
Lua
\u{1908}
Matlab
char(6408)
Perl
"\x{1908}"
PHP
\u{1908}
PostgreSQL
U&'\1908'
PowerShell
`u{1908}
Python
\u1908
Ruby
\u{1908}
Rust
\u{1908}
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