What 𘪙 means
It helps index and describe larger Tangut characters.
The Tangut script, also called Xixia, was created around 1036 under the first emperor of the Western Xia state to write the Tangut language.
In modern dictionaries, scholars use components to find and analyze full Tangut characters. There is no single standard component set, and 666 is simply this component's sequential catalog label.
What does Tangut Radical-410 mean?
It is an older catalog label for this component.
A 2014 Unicode proposal called 𘪙 Tangut Radical-410 and used it to index Tangut ideographs from 𘋤 through 𘋸. Those characters are linked through that proposal's filing system, not because this component gives them a shared meaning.
How do I type 𘪙?
Enter U+18A99 with hexadecimal Unicode input.
Use your editor's hexadecimal Unicode command. If a box appears, the selected font may not include Tangut glyphs.
Tangut components can also appear in an Ideographic Description Sequence (IDS), notation for showing how a Tangut character is built. Here, 𘪙 describes structure; it does not format neighboring text.
Scholarly and technical: it identifies a component used to index and describe Tangut writing.
Use it to describe a Tangut character, not as a word or translation.
Questions people ask
1Why is 𘪙 showing as a box?
A font issue. The selected font may not include the Tangut component glyph, even when the text contains the right character. Use a font with Tangut coverage.
How to type 𘪙
𘪙\18A99Codes and encoding1 code points
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.