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+1918 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
6424
UTF-8
E1 A4 98
UTF-16
19 18
UTF-32
00 00 19 18
URL-Quoted
%E1%A4%98
HTML hex reference
ᤘ
Mojibake mal de windows-1252
ᤘ
Codificación: GB18030 (hexadecimales bytes)
81 34 EE 38
RFC 5137
\u'1918'
Bash and Zsh inside echo -e
\u1918
C and C++
\u1918
C#
\u1918
CSS
\001918
Excel
=UNICHAR(6424)
Go
\u1918
JavaScript
\u1918
Modern JavaScript since ES6
\u{1918}
JSON
\u1918
Java
\u1918
Lua
\u{1918}
Matlab
char(6424)
Perl
"\x{1918}"
PHP
\u{1918}
PostgreSQL
U&'\1918'
PowerShell
`u{1918}
Python
\u1918
Ruby
\u{1918}
Rust
\u{1918}
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