This character is a Other Letter and is mainly used in the Hebrew script.
The glyph is not a composition. It has no designated width in East Asian texts. In bidirectional text it is written from right to left. When changing direction it is not mirrored. This letter joins with other adjacent letters and numbers to form a word. The word that U+05DE forms with similar adjacent characters and the hyphen prevents a line break inside it.
The Wikipedia has the following information about this codepoint:
Mem (also spelled Meem, Meme, or Mim) is the thirteenth letter of the Semitic abjads, including Hebrew mēmמ, Aramaic mem 𐡌, Syriac mīm ܡ, Arabic mīmم, and Phoenician mēm 𐤌. Its sound value is [m]. The Phoenician letter gave rise to the Greek mu (Μ), Etruscan , Latin M, and Cyrillic М.
Representations
System
Representation (click value to copy)
Nº
1502
UTF-8
D7 9E
UTF-16
05 DE
UTF-32
00 00 05 DE
URL-Quoted
%D7%9E
HTML hex reference
מ
Wrong windows-1252 Mojibake
מ
Encoding: CP424 (hex bytes)
56
Encoding: CP856 (hex bytes)
8E
Encoding: CP862 (hex bytes)
8E
Encoding: CP1255 (hex bytes)
EE
Encoding: GB18030 (hex bytes)
81 30 FA 36
Encoding: ISO8859_8 (hex bytes)
EE
Encoding: CP424 (hex bytes)
56
Adobe Glyph List
afii57678
Adobe Glyph List
mem
Adobe Glyph List
memhebrew
digraph
M+
RFC 5137
\u'05DE'
Bash and Zsh inside echo -e
\u05DE
C and C++
\u05DE
C#
\u05DE
CSS
\0005DE
Excel
=UNICHAR(1502)
Go
\u05DE
JavaScript
\u05DE
Modern JavaScript since ES6
\u{5de}
JSON
\u05DE
Java
\u05DE
Lua
\u{5DE}
Matlab
char(1502)
Perl
"\x{5DE}"
PHP
\u{5de}
PostgreSQL
U&'\05DE'
PowerShell
`u{5DE}
Python
\u05DE
Ruby
\u{5de}
Rust
\u{5de}
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