Left Square Bracket with Underbar ⦋

⦋ (U+298B) is a standard Unicode character that you can copy and paste anywhere text is accepted. This page provides a concise reference with safe tips, internal links, and practical guidance so you can use it reliably across apps and platforms.

What it is and where it’s used: Left Square Bracket with Underbar is part of the Symbols family (block: Miscellaneous Mathematical Symbols-B). If you need styled or decorative alternatives, try our Fancy Text tool to generate compatible text that works in most modern interfaces.

History & usage: The LEFT SQUARE BRACKET WITH UNDERBAR is a Unicode character in the Miscellaneous Mathematical Symbols-B block. It shows a left square bracket with an underline or bar beneath it. In history, such bracket variants were created to extend the set of delimiters used in mathematics and technical writing. They help distinguish nested groups or parameters when a standard bracket might clash with other symbols. In practice, this character is not common in everyday text. When used, it serves to mark the start of a quoted section, a group of items, or a parameter list in specialized documents. In code and formulas, it can help separate elements clearly and reduce ambiguity alongside other brackets. Users may encounter it in fonts or systems that support extended mathematical notation. The symbol is read as a left delimiter and helps pair with a corresponding right bracket in the same style. Its use is limited and mostly technical. Writers and developers rely on such variants to convey structure without changing the surrounding punctuation. Overall, it is a niche tool for precise grouping in math and technical contexts.

Copy and input: the quickest method is to copy the character here. You can also insert it by its codepoint U+298B in many development tools or editors. Some operating systems provide a character viewer or input palette that lets you search by name or code and insert the glyph into documents.

Display and fallback: if you see an empty box (tofu) or a placeholder rectangle, the active font might not include this codepoint. Switching to a font with broader Unicode coverage or using a fallback font usually fixes the issue. On the web, ensure the page’s font stack includes a general‑purpose fallback.

Related references: browse the Categories for similar characters. When choosing a symbol, prefer the official codepoint for semantic clarity and better compatibility with search, copy, and accessibility tooling.

See our category page for related symbols.