Theword joiner (WJ) is aUnicode formatcharacter which is used to indicate thatline breaking should not occur at its position.^[1] It does not affect the formation ofligatures orcursive joining and is ignored for the purpose of text segmentation.^[1] It is encoded since Unicode version 3.2 (released in 2002) asU+2060 WORD JOINER (⁠).

The word joiner replaces thezero-width no-break space (ZWNBSP, U+FEFF), as a usage of the no-break space of zero width. TheZWNBSP is originally and currently used as thebyte order mark (BOM) at the start of a file. However, if encountered elsewhere, it should, according to Unicode, be treated as a word joiner, ano-break space of zero width.

The deliberate use of U+FEFF for this purpose is deprecated as of Unicode 3.2, with theword joiner strongly preferred.^[1][2]

• Byte order mark, which usesU+FEFF ZERO WIDTH NO-BREAK SPACE (ZWNBSP) character
• Zero-width space
• Zero-width joiner, which in scripts such as Arabic or Indic causes two characters to be shown in a connected form, even if they would otherwise not.

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