This character is a Other Letter and is mainly used in the Ogham 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+1683 forms with similar adjacent characters prevents a line break inside it.
The Wikipedia has the following information about this codepoint:
Fearn (ᚃ) is the Irish name of the third letter (Irish "letter": sing.fid, pl.feda) of the Ogham alphabet, meaning "alder-tree". In Old Irish, the letter name was fern[fʲer͈n͈], which is related to Welsh gwern(en), meaning "alder-tree(s)". Its Primitive Irish root was *wernā and its phonetic value then was [w]. Its Old Irish and modern phonetic value is [f].
Representations
System
Representation (click value to copy)
Nº
5763
UTF-8
E1 9A 83
UTF-16
16 83
UTF-32
00 00 16 83
URL-Quoted
%E1%9A%83
HTML hex reference
ᚃ
Wrong windows-1252 Mojibake
ᚃ
Encoding: GB18030 (hex bytes)
81 34 AC 37
RFC 5137
\u'1683'
Bash and Zsh inside echo -e
\u1683
C and C++
\u1683
C#
\u1683
CSS
\001683
Excel
=UNICHAR(5763)
Go
\u1683
JavaScript
\u1683
Modern JavaScript since ES6
\u{1683}
JSON
\u1683
Java
\u1683
Lua
\u{1683}
Matlab
char(5763)
Perl
"\x{1683}"
PHP
\u{1683}
PostgreSQL
U&'\1683'
PowerShell
`u{1683}
Python
\u1683
Ruby
\u{1683}
Rust
\u{1683}
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