General Category - Connector Punctuation

Connector Punctuation is a category for characters that visually join other characters together, typically forming a single lexical unit or a compound word, without altering their inherent sounds. These marks are most commonly seen in writing systems as underscores or low lines, such as the character U+005F ( _ ), which is used in programming and file names to separate words. Beyond the underscore, this category includes other rare or language-specific characters like the Arabic tatweel, which elongates a word, or certain historic signs used to link morphemes in ancient scripts. The defining trait is that these characters act as a purely orthographic bridge, connecting letters that might otherwise stand alone, while still being considered separate graphemes from the surrounding text. Their role is entirely structural, providing a visual link that aids in the clear segmentation of compound terms or technical identifiers.