This character is a Other Letter and is mainly used in the Ethiopic 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+1220 forms with similar adjacent characters prevents a line break inside it.
The Wikipedia has the following information about this codepoint:
Śawt ሠ is a letter of the Ge'ez abugida, descended from Epigraphic South Arabian , in Ge'ez representing ś. It is reconstructed as descended from a Proto-Semitic voiceless lateral fricative *ś[ɬ], like the Welsh pronunciation of the ll in llwyd. It survived only in South Semitic as an independent phoneme.
Representations
System
Representation (click value to copy)
Nº
4640
UTF-8
E1 88 A0
UTF-16
12 20
UTF-32
00 00 12 20
URL-Quoted
%E1%88%A0
HTML hex reference
ሠ
Wrong windows-1252 Mojibake
áˆ
Encoding: GB18030 (hex bytes)
81 33 BA 34
RFC 5137
\u'1220'
Bash and Zsh inside echo -e
\u1220
C and C++
\u1220
C#
\u1220
CSS
\001220
Excel
=UNICHAR(4640)
Go
\u1220
JavaScript
\u1220
Modern JavaScript since ES6
\u{1220}
JSON
\u1220
Java
\u1220
Lua
\u{1220}
Matlab
char(4640)
Perl
"\x{1220}"
PHP
\u{1220}
PostgreSQL
U&'\1220'
PowerShell
`u{1220}
Python
\u1220
Ruby
\u{1220}
Rust
\u{1220}
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